Trending Phone Numbers
Detailed information about phone numbers that are currently trending.
Fiber-line sales
About the toll-free number 0800-777-9017. Widely reported as a sales call pushing a switch to a different fiber-line provider.
About the toll-free number 0800-500-0291. Reported as a sales call promoting a switch to a different fiber-line service.
About the toll-free number 0800-300-2449. Reported as a solicitation call from a fiber-line reseller.
About the toll-free number 0120-993-979. Reported as a sales call promoting a fiber-line switch.
About the toll-free number 0120-958-930. As of 2026-08-03, phone-number directories carry reports describing line-contract sales calls such as SoftBank Hikari.
About the toll-free number 0800-500-7333. Reported as a sales call promoting an internet-line switch.
About the IP phone number 050-3147-5542. Reported as a sales call promoting a fiber-line switch.
About the toll-free number 0800-300-0336. Reported as a fiber-line sales call.
An IP phone number with many user reports of fiber-line sales calls, including callers naming themselves "SB Support" or a "fiber line company" (as of 2026-08-03).
A number reported over line-switch solicitation calls in the name of a "Fiber-Line Support Center" (as of 2026-08-03).
About the toll-free number 0800-919-4650. As of 2026-08-03, multiple directories carry user reports describing telecom-line sales calls, registered under the name "Linear" with reports of callers claiming NTT-agency or carrier affiliations.
About the IP phone number 050-3133-5964. Directories and social media carry user reports describing fiber-line sales calls in the name of NTT or a line-support center (as of 2026-08-03).
About the toll-free number 0120-051-947. Directories carry user reports describing fiber-discount sales in the name of A Support and au Hikari solicitations (as of 2026-08-03).
About the toll-free number 0120-924-094. Directories carry many user reports describing fiber-line sales calls in the name of Fact (as of 2026-08-03).
About the toll-free number 0800-080-3344. Directories carry user reports describing internet-line switch sales in the name of a net customer support desk (as of 2026-08-03).
About the IP phone number 050-5050-3273. Many user reports describe calls posing as major carriers or their support desks pushing line switches with modem or discount pretexts (as of 2026-08-03).
Used-car buying sales
Sales disguised as electricity-rate survey
About the toll-free number 0120-829-571. Widely reported as a sales call disguised as an electricity-rate survey.
About the toll-free number 0800-888-6380. Reported as an automated-voice survey disguised as an electricity-rate survey.
About the toll-free number 0800-111-7302. Reported as an automated-voice survey impersonating a power company.
About the toll-free number 0800-300-7022. Reported as an automated-voice survey disguised as an electricity-rate survey.
A number reported by multiple sites over distribution-board inspection sales calls in the name of "Kanto Energy Support" (as of 2026-08-03).
About the Tokyo landline 03-6868-2055. Directories and social media carry many user reports describing automated-voice survey calls in the name of an electricity-rate survey center (as of 2026-08-03).
Sales impersonating power companies
About the toll-free number 0120-762-840. Reported as a sales call impersonating TEPCO.
About the toll-free number 0120-764-027. Reported as a sales call impersonating a power company.
About the toll-free number 0800-111-4406. Reported as an automated-voice survey impersonating a power company.
About the IP phone number 050-3125-0677. Reported as a sales call impersonating a power company.
A number with many user reports of sales calls and automated voices in the name of power companies, including callers naming a company that does not serve the recipient's area (as of 2026-08-03).
A number reported over sales calls in Kansai Electric Power's name asking to review bill details. We could not find it listed among Kansai Electric Power's official contacts (as of 2026-08-03).
About the Nagoya landline number 052-386-0297. As of 2026-08-03, multiple directories carry user reports describing electricity-plan sales calls in Chubu Electric Power's name.
About the IP phone number 050-5785-2777. Directories carry user reports describing calls in the name of LS that pose as a power-company affiliate to set up visits (as of 2026-08-03).
About the Osaka landline 06-7650-4432. Many user reports describe calls in the name of GR posing as a power-company affiliate to schedule electricity-measurement visits (as of 2026-08-03).
About the mobile number 070-2655-8725. Many user reports describe automated-voice electricity surveys in the name of TEPCO and others (as of 2026-08-03).
Automated-voice survey
About the toll-free number 0120-197-319. GS Research Center (Green Ship Co., Ltd.), a public-opinion research firm, lists this number on its official page of survey caller numbers.
About the IP phone number 050-3117-3636. Reported as an automated-voice survey related to subsidies.
A mobile number reported by multiple sites over automated-voice surveys in the name of power companies or rental-housing research (as of 2026-08-03).
A number with many reports of automated-voice calls presenting themselves as election or cabinet-approval surveys and prompting for postal-code input (as of 2026-08-03).
Safe number
About the toll-free number 0120-384-021. KDDI (au) lists this number in its official FAQ of caller numbers. Reports describe it being used for au Denki campaign notices.
About the toll-free number 0120-353-134. Listed on Idemitsu Credit's official site as its Life Consult Desk for cardholders. Some reports describe insurance-related sales calls.
The Yamato Transport call-center phone number for landline callers. Used for pickup bookings, redelivery requests, and shipment inquiries.
The Sagawa Express Global Call Center phone number. Listed on the official website as the inquiry desk for international shipping services.
The English-language line of Japan Post's Customer Service Center. Listed on Japan Post's official inquiry page.
The phone number of home builder Ishinhome's Tsuyama shop (Ishin Housing Research Institute Co., Ltd., Tsuyama Branch). A legitimate number listed on the official website.
The NTT East inquiry and application desk. Listed in NTT East's official FAQ as a reception number alongside "116".
NTT West's fault-report line (113) for mobile callers. Listed on NTT West's official 3-digit-services page.
The inquiry phone number of OCN Online Shop (formerly NTT-X Store), an electronics e-commerce site run by NTT Docomo. A legitimate number listed on the shop's official pages.
The call-center phone number of Tokyo Solamachi, the shopping complex at Tokyo Skytree Town. Listed on the official contact page as 0570-55-0102.
The NTT Docomo information-center phone number. Used for inquiries about mobile-phone contracts and billing.
The Credit Saison (Saison Card) information-center phone number. A legitimate number listed as the contact desk in official guides for Saison-affiliated cards.
The National Pension desk of iVisit Co., Ltd., a contractor handling premium-payment reminders for the Japan Pension Service. A legitimate number listed on the agency's official website.
The phone number of Toshin High School's Higashikurume campus, a university-prep school. A legitimate number listed on the campus official website.
An NHK reception-fee contact number. A legitimate number listed on NHK's official site as the desk for reception-contract procedures.
An AEON Financial Service phone number. A legitimate number listed on the official AEON Card site as a sender of SMS and automated-voice payment notices.
The phone number of Iwade Post Office in Iwade, Wakayama. A legitimate number listed as the office's main line in Japan Post's official post-office directory.
One of the caller numbers KDDI (au) uses to contact customers. Listed in au's official FAQ enumerating KDDI's outbound numbers.
The toll-free line of the Morioka office of Daikyo Anabuki Real Estate. A legitimate number listed on the office page of the company's official website.
The Rakuten Card contact-center phone number. A legitimate number listed on Rakuten Card's official website as its card-inquiry desk.
The OCN Customer Front support desk for the internet provider OCN. A legitimate number listed on the official OCN and NTT Docomo websites.
The ANA (All Nippon Airways) domestic reservation and information center. A legitimate number used for airline-ticket reservations and inquiries.
DHC's toll-free phone-order line. A legitimate number listed in the customer guide on DHC's official website.
A Tokyo Gas number listed in an official notice as the inquiry desk for its My Tsuho / home-monitoring gas services.
The customer-consultation desk of Yamato Protec, a Japanese fire-extinguisher and fire-protection manufacturer. A legitimate number listed on the official website.
About the Tokyo landline number 03-6626-2546. Mizuho Bank's official FAQ lists it as the sender of SMS notifying completion of direct-debit registration.
About the IP phone number 050-2016-5000. Listed in official JR East FAQs as the Eki-net Support Center. Phishing emails impersonating Eki-net sometimes quote this genuine number, so verify the email itself separately.
About the navi-dial number 0570-550-987. Listed on the Japan Pension Service official site as the national-pension desk of iVisit, a contractor handling pension-premium collection.
About the toll-free number 0800-777-0194. Listed in the KDDI (au) official FAQ of caller numbers. Several directories also carry reports describing it as sales calls.
About the Tokyo landline number 03-6705-0713. Listed in the official Mitsubishi UFJ NICOS FAQ as a caller number for payment-related notices (including automated voice calls).
About the toll-free number 0120-949-077. Listed on the official Sumitomo Mitsui Card site as the Shinjuku life-insurance desk. Many directory reports describe insurance sales calls.
About the toll-free number 0120-967-328. Listed in NTT Docomo's official FAQ as a legitimate caller number of the NTT Docomo Consulting Center, used for smartphone and Docomo Hikari proposals.
About the toll-free number 0800-222-8275. Listed on Kansai Electric Power's official Kanden Kurashi Mall guide as a caller number for insurance-consultation service information.
About the Tokyo landline number 03-5249-5091. FUNDELY's health-food delivery service Mealtime lists it as a contact number (for mobile callers) on its official blog and X account.
About the IP phone number 050-5830-6520. Both View Card and Orico officially list it as the SMS sender for card-renewal notices. It appears to be a shared SMS-gateway sender used by multiple card companies.
Other nuisance calls
About the IP phone number 050-3165-7530. As of 2026-08-03, multiple phone-number directories carry many user reports describing one-ring calls (the phone rings once and disconnects) from this number.
About the toll-free number 0800-300-9536. As of 2026-08-03, phone-number directories carry reports describing survey calls in the name of a "Kansai rental-housing survey center".
About the toll-free number 0120-427-611. Reported as an energy-related sales call.
About the toll-free number 0800-300-3052. Reported as a sales call from a mail-order operator.
About the toll-free number 0120-984-344. Reported as a sales call for unwanted-item pickup and telecom-plan changes.
About the toll-free number 0800-500-9856. As of 2026-08-03, directories carry many user reports describing calls claiming to be from Aichi Prefectural Police. Real police do not ask about assets or personal data from this kind of number.
About the toll-free number 0120-502-865. Reported as a sales call.
About the Tokyo landline 03-4579-5608. Reported as a suspicious call.
About the Tokyo landline 03-6633-4839. Reported as a sales call.
About the IP phone number 050-3032-5038. Reported as a suspicious call.
About the IP phone number 050-5810-7314. As of 2026-08-03, multiple directories carry user reports describing solicitation calls from a major tutoring service.
About the toll-free number 0120-921-507. Reported as a sales call.
About the IP phone number 050-3128-4291. As of 2026-08-03, multiple directories carry user reports describing calls offering in-home purchases of used goods.
A number flagged by multiple sites over bogus-billing SMS reading "the support center has an important matter to confirm" that lure recipients into calling back (as of 2026-08-03).
A number with many reports of newspaper-subscription solicitation calls in the name of an Asahi Shimbun sales office (ASC), including reports of repeated calls after declining (as of 2026-08-03).
A mobile number reported over real-estate investment sales calls, such as studio-condo pitches (as of 2026-08-03).
A number listed by multiple judicial-scrivener offices and directories as used by an illegal lender calling itself "CashBus", including consultation cases about collection calls to workplaces (as of 2026-08-03).
A number with many reports of calls offering to buy unwanted goods or precious metals and pressing for home visits, with multiple reviews suspecting aggressive in-home purchasing (as of 2026-08-03).
About the toll-free number 0800-777-2224. As of 2026-08-03, multiple directories carry user reports describing used-goods purchase sales calls in the name of "Cowl".
A number reported over business-targeted sales calls in the name of a "Business Management Center", including reports of subsidy-related pitches (as of 2026-08-03).
A number reported over used-goods purchase telemarketing in the name of a recycling shop, with registrations and reviews suspecting aggressive in-home purchasing (as of 2026-08-03).
About the IP phone number 050-5291-6280. Multiple user reports describe PBX inspection sales in the name of Lead, with the caller turning rude when refused (as of 2026-08-03).
About the IP phone number 050-1783-8344. As of 2026-08-03, multiple phone-number directories carry user reports describing sales calls about electricity-plan switching and storage batteries.
About the toll-free number 0800-500-0619. Directories carry user reports describing mail-order cosmetics solicitations in the name of Bizento (as of 2026-08-03).
About the mobile number 080-6830-5421. User reports describe graduate-recruiting sales calls in the name of Neo Career, repeated despite refusals (as of 2026-08-03).
About the mobile number 090-9136-5383. Multiple reports describe sales calls in the name of Netamoto implying an existing exchange to reach the president (as of 2026-08-03).
About the mobile number 070-1247-7680. Directories carry user reports describing real-estate investment sales calls (as of 2026-08-03).
About the IP phone number 050-3100-9434. Directories carry user reports describing listing-sales calls in the name of the job site Bizlista (as of 2026-08-03).
About the toll-free number 0120-983-429. Many user reports describe calls claiming a statutory gas-appliance inspection that push a visit date and hang up abruptly when refused (as of 2026-08-03).
About the IP phone number 050-3175-0103. Multiple user reports describe repeated sales calls in the name of a custom-home design company after a catalog request (as of 2026-08-03).
About the toll-free number 0800-700-6005. Directories carry user reports describing calls in the name of Active that use Google Maps or Street View listings as a pretext leading into electricity-plan sales (as of 2026-08-03).
About the mobile number 090-7021-5138. Directories and social media carry user reports describing calls posing as Metropolitan Police investigators demanding an appearance (as of 2026-08-03).
About the mobile number 080-3454-7872. Multiple reports describe sales calls in the name of DYM implying an existing partnership to reach the president (as of 2026-08-03).
About the toll-free number 0800-080-3390. Directories carry user reports describing mail-order and health-product solicitations (as of 2026-08-03).
About the landline 042-816-3353. jpnumber carries several user reports describing calls in the name of Rakuten Card. The number does not appear among Rakuten Card official desks (as of 2026-08-03).
About the Shizuoka landline 054-333-9247. Directories carry user reports describing telecom-line sales calls in the name of Telemarker (as of 2026-08-03).
About the Tokyo landline 03-6332-6602. Directories carry user reports describing recruiting-ad and staffing sales calls aimed at company representatives (as of 2026-08-03).
About the Tokyo landline 03-6821-2601. Directories carry many user reports describing copier sales calls in the name of Broadway (as of 2026-08-03).
About the Tokyo landline 03-6691-8214. Directories carry user reports describing M&A brokerage sales calls (as of 2026-08-03).
About the IP phone number 050-5527-6140. Multiple reports describe real-estate investment sales calls in the name of Prestige (as of 2026-08-03).
About the IP phone number 050-1790-2542. Directories carry user reports describing phone-equipment sales calls in the name of Lead (as of 2026-08-03).
About the IP phone number 050-5497-3520. User reports describe calls in the name of the job site Baitoru asking for the hiring manager (as of 2026-08-03).
About the IP phone number 050-3110-0312. Directories carry user reports describing tax-accountant referral sales in the name of Biz Platform, some noting an AI voice (as of 2026-08-03).
About the IP phone number 050-1790-9909. Directories carry user reports describing investment-course solicitation calls (as of 2026-08-03).
About the toll-free number 0800-222-8276. Directories carry user reports describing insurance information calls related to Epos Card. No listing on the official site has been confirmed (as of 2026-08-03).
About the mobile number 080-2653-2405. Directories carry user reports describing SMS posing as government benefit programs (as of 2026-08-03).
About the mobile number 090-4190-6149. Directories carry user reports describing it as a sender of suspicious SMS (as of 2026-08-03).
About the mobile number 070-3538-7973. Multiple user reports describe SMS posing as failed PayPay payments (as of 2026-08-03).
About the mobile number 090-7736-1681. User reports describe sales calls in the name of World pitching social-insurance savings and tax-accountant referrals (as of 2026-08-03).
About the IP phone number 050-3160-7973. Many user reports describe unwanted-item buyback sales calls in the name of Rakuraku (as of 2026-08-03).
About the mobile number 080-5316-1605. Many user reports describe phishing SMS impersonating multiple services, such as PayPay arrears, card restrictions, and Amazon card updates (as of 2026-08-03).
Caller not verified
About the toll-free number 0800-170-2530. As of 2026-08-03, major job boards list this number as the application contact of a staffing agency (Beat Co., Ltd., Osaka branch). We found no substantive nuisance-call reports.
About the Tokyo landline number 03-6853-6075. As of 2026-08-03, a phone directory registers it as an Aeon mobile-phone counter (Itabashi store). We found no substantive nuisance-call reports.
Several phone-number directories report this number as NTT East's My Page registration support center. It could not be confirmed on NTT East's official website.
Multiple directories report this number as a PayPay Card payment-reminder line. PayPay Card's official help lists a different number (0570-00-5046) as its automated caller; this one is not officially confirmed.
About the IP phone number 050-5369-3744. Directories carry user reports describing Norton license-renewal SMS from this number, but no official listing of this exact number has been confirmed (as of 2026-08-03).
About the Fukuoka landline 092-282-6254. Directories consistently report it as an accident-response desk of Aioi Nissay Dowa Insurance, but no listing on the company official site has been confirmed (as of 2026-08-03).
About the IP phone number 050-3801-3651. Reports describe it as a Rakuten Card fraud-detection SMS sender, while some security pages flag it for caution. Only 050-3801-3600 is officially published by Rakuten Card (as of 2026-08-03).