Prefix 206-640 — Seattle, WA
Numbers in the 206-640 prefix are registered to the Seattle rate center in WA, inside area code 206. The prefix is the second block of a ten-digit US number (206-640-XXXX) and pins the number to a billing locality.
NANPA's central-office code records list ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (OCN 7173) as the code holder, assigned February 6, 2019. Because 206-640 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
The rate center lies in the Seattle-Tacoma-Bellevue, WA Metropolitan Statistical Area. The serving LATA is 674. Local time follows the Pacific zone.
Spoofing means this prefix on your screen doesn't guarantee a Seattle caller. Verify independently before trusting a request for money or data.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 206-637 | Seattle | T-MOBILE USA, INC. |
| 206-638 | Seattle | IP HORIZON LLC |
| 206-639 | Seattle | ONVOY, LLC - WA |
| 206-641 | Seattle | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 206-642 | Seattle | SPOK, INC. |
| 206-643 | Seattle | NUSO, LLC |
FAQ
Where is 206-640 located?
The prefix is assigned to the Seattle rate center in WA, area code 206. It is part of the Seattle-Tacoma-Bellevue, WA Metropolitan Statistical Area.
Which company owns 206-640 numbers?
ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.
Is a call from 206-640 safe to answer?
The prefix itself says nothing about the caller. Legitimate Seattle businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.