Enter a number in E.164 format (for example +441952612345)
The prefix +81 4390 serves the region of Kisarazu, Chiba.
The prefix +81 4390 is operated by "NTT".
Geolocation for this prefix: (35.3810808, 139.9247334).
Use this area-code page to access location, carrier, and prefix info for partial phone numbers.
Country: 🇯🇵 JP
Country Code: +81
Carrier: NTT
Prefix: 4390
Location: Kisarazu, Chiba
Coords: 35.3810808, 139.9247334
Area Code Page: +81 4390
Comments: Disabled for area-code pages
Example: +81 4390 *** ***
If you have a full number, use the search box above to view the number-specific page.
+81 4390 is an area code/prefix that appears to be associated with Kisarazu, Chiba. 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.
Contribute to our community by reporting spam or scam calls.
Verify a caller’s identity to prevent fraud or unwanted solicitations.
Ringbat supports lookups for numbers worldwide, not just local calls.
Coordinates and area codes can reveal where the number is based.
Copyright © 2025 Ringbat. International Reverse Phone Number Lookup. Legal / DMCA