Enter a number in E.164 format (for example +441952612345)
The prefix +81 5811 serves the region of Japan.
Known carrier for +81 5811: "NTT".
Geolocation for this prefix: (36.5748441, 139.2394179).
Searching a number prefix can reveal carrier and location info from Ringbat's database.
Country: 🇯🇵 JP
Country Code: +81
Carrier: NTT
Prefix: 5811
Location: Japan
Coords: 36.5748441, 139.2394179
Area Code Page: +81 5811
Comments: Disabled for area-code pages
Example: +81 5811 *** ***
If you have a full number, use the search box above to view the number-specific page.
+81 5811 is an area code/prefix that appears to be associated with Japan. It may be assigned to multiple phone numbers within that region.
Yes — use Ringbat's number search to look up a full number. This area-code page helps when only part of a number is known.
Carrier information for this prefix: NTT. In some cases multiple carriers may use similar prefixes.
Reverse lookups allow you to see who is calling, whether it’s a friend, business, or spam.
Phone lookups are a smart way to screen unknown calls and protect yourself.
Contribute to our community by reporting spam or scam calls.
Pro tip: Checking comments can help you avoid unwanted calls.
Global phone lookups help identify calls from foreign numbers.
Location data adds context to unknown or suspicious calls.
Copyright © 2025 Ringbat. International Reverse Phone Number Lookup. Legal / DMCA