What Are "Low Numbers"?
In the world of phone numbers, there is a concept called "wakaban" (low numbers) - numbers whose trailing digits are small, like 0001 or 0010. Conversely, numbers ending in 9999 or 8888 are called "roban" (high numbers). Low numbers were often assigned early in a telephone service's history, and tend to be held by long-established companies and government offices.
For example, in Tokyo's 03 band, numbers with trailing digits close to 0001 are typically held by organizations that have used telephones since the Meiji or Taisho eras. Since phone numbers were generally assigned in order of application, low numbers are "living witnesses to telephone history."
Japan's First Phone Numbers
Japan's telephone service began in 1890 (Meiji 23) in Tokyo and Yokohama, with 155 subscribers in Tokyo and 42 in Yokohama - 197 total. The numbers assigned at that time were Japan's first phone numbers. Tokyo's number 1 was reportedly assigned to the Tokyo Prefectural Office (now the Tokyo Metropolitan Government), and number 2 to the Ministry of Communications (a predecessor of today's MIC).
Numbers at that time were simple 1- to 3-digit figures. As subscribers grew, digits expanded to the current 10-digit system. The History of Phone Number Digit Lengths details how the numbering system has been expanded over 130+ years.
Characteristics of Organizations with Low Numbers
- Government offices and municipalities: Among the first telephone subscribers, they hold the lowest numbers. Prefectural offices, city halls, police stations, fire departments
- Long-established companies: Businesses founded in the Meiji to early Showa eras. Department stores, banks, newspapers, railway companies
- Major hospitals: Regional core hospitals adopted telephones early and often hold low numbers
- Hotels and inns: Accommodation facilities that adopted telephones early to serve foreign guests
Low numbers are not just digit sequences - they symbolize an organization's history and credibility. Seeing a number like "03-3xxx-0001" may give the impression that "this company has a long history."
Can Low Numbers Be Bought and Sold?
Phone number sales are not explicitly prohibited by law. However, phone numbers are "leased" from carriers - subscribers do not own them. If canceled, the number returns to the carrier and enters the number recycling process.
In practice, numbers are sometimes transferred through corporate mergers and acquisitions (M&A). Number portability (MNP) also allows keeping the same number when switching carriers. However, a market for trading low numbers (like "this low number is worth a premium") is not common in Japan.
On the other hand, "good numbers" for mobile phones (repeated digits, sequential numbers) are occasionally traded on auction sites. Numbers like 090-xxxx-1111 or 090-1234-5678 have reportedly sold for tens to hundreds of thousands of yen. However, this may violate carrier terms of service and exists in a gray area.
Low Numbers Around the World
Interest in special numbers is not unique to Japan. In China, "8" is considered lucky, and phone numbers ending in 8888 have sold at auction for millions of yen. Conversely, "4" is considered unlucky, and numbers like 4444 are avoided.
In the UAE, short numbers and repeating patterns command high prices. In 2006, the number "050-6666666" sold at a charity auction for approximately 28 million yen, making international news.
In the US, "vanity numbers" that spell words on the phone keypad are popular. For example, 1-800-FLOWERS (1-800-356-9377) is famous as a flower delivery service number. It is the same concept as Japanese wordplay numbers, but using the alphabet.
How to Check How "Low" Your Number Is
There is no official way to determine exactly how "low" your phone number is, but some clues allow estimation:
- Area code and local exchange combination: Understanding phone number structure reveals that smaller local exchange digits likely indicate earlier allocation
- Subscriber number digits: Smaller trailing 4 digits suggest earlier allocation within that local exchange
- For mobile phones: 090 numbers are from an older era than 080 or 070. Knowing the differences between 090, 080, and 070 reveals your number's "generation"
Having a low number does not confer any practical benefit, but imagining "this number has been in use for decades" adds a sense of historical weight to the digits you use every day. It is a feeling similar to appreciating truffles - finding value in rarity itself.
When Low Numbers Disappear - Business Closures and Number Fate
When a long-established company with a low number goes out of business, the number is returned to the carrier since it was only "leased." As explained in How Number Recycling Works, returned numbers are reassigned to new subscribers after a dormancy period. Even a low number used for over 100 years since the Meiji era can be assigned to an entirely different company or individual if the contract lapses.
Cases of historically significant low numbers disappearing due to department store closures or regional bank mergers are not uncommon. In regional cities, inns and shops operating since before WWII have closed, and the area's oldest phone numbers have been lost. Phone numbers have no cultural heritage protection system, so no matter how historically valuable a number may be, it quietly vanishes when the contract ends.
However, in corporate M&A, phone numbers are sometimes transferred. Maintaining the acquired company's low number preserves the customer base and local recognition. The inclusion of number transfer in M&A contract terms demonstrates that the intangible value of numbers is recognized.
The lack of a system to preserve the historical value of numbers is one challenge of telecommunications infrastructure. Buildings have cultural property protection laws, and place names have preservation efforts, but phone numbers have no such system. The MIC's numbering plan aims at efficient number resource management, not preserving individual numbers' historical context. How to handle these "intangible historical assets" in the digital age may be a topic worth future discussion.
Low numbers or not, phone numbers are not mere strings of digits - they carry the history of the people and organizations that have used them. Looking back at the evolution of phone number digit lengths reveals that the numbering system itself is a mirror reflecting social change. It might be interesting to look into what history your own phone number carries.