Enter a number in E.164 format (for example +441952612345)
The prefix +81 1640 serves the region of Japan.
The prefix +81 1640 is operated by "NTT".
Coordinates for +81 1640 are (36.5748441, 139.2394179).
Partial number searches match area-code pages like this — helpful if only the start of a number is known.
Country: 🇯🇵 JP
Country Code: +81
Carrier: NTT
Prefix: 1640
Location: Japan
Coords: 36.5748441, 139.2394179
Area Code Page: +81 1640
Comments: Disabled for area-code pages
Example: +81 1640 *** ***
If you have a full number, use the search box above to view the number-specific page.
+81 1640 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.
Lookups help you prevent spam calls and identify important or suspicious contacts.
Ringbat provides community-powered insights. Leave a comment to help others.
Tip: Always verify unknown callers before responding.
International numbers can be tracked to find the country, region, and carrier.
Area codes give clues about where the call originated.
Copyright © 2025 Ringbat. International Reverse Phone Number Lookup. Legal / DMCA