Enter a number in E.164 format (for example +441952612345)
The prefix +81 3813 serves the region of Tokyo.
Carrier for this prefix: "NTT".
The area code location is mapped at (35.6768601, 139.7638947).
Searching a number prefix can reveal carrier and location info from Ringbat's database.
Country: 🇯🇵 JP
Country Code: +81
Carrier: NTT
Prefix: 3813
Location: Tokyo
Coords: 35.6768601, 139.7638947
Area Code Page: +81 3813
Comments: Disabled for area-code pages
Example: +81 3813 *** ***
If you have a full number, use the search box above to view the number-specific page.
+81 3813 is an area code/prefix that appears to be associated with Tokyo. 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.
Common reasons for lookups include avoiding telemarketing calls, blocking fraud attempts, or verifying business contacts.
Community reports make unknown calls easier to understand.
Pro tip: Checking comments can help you avoid unwanted calls.
Reverse lookup works across multiple countries to provide accurate info.
Coordinates and area codes can reveal where the number is based.
Copyright © 2025 Ringbat. International Reverse Phone Number Lookup. Legal / DMCA