Prefix 206-637 — Seattle, WA
206-637 identifies a block of numbers in Seattle, WA, within the 206 area code. Every US prefix is tied to exactly one rate center; this one is Seattle.
The rate center lies in the Seattle-Tacoma-Bellevue, WA Metropolitan Statistical Area. The serving LATA is 674. Local time follows the Pacific zone.
Treat the on-screen number as a hint, not evidence — 206-637 can be spoofed like any US prefix. If a call feels off, verify through an official callback number and file a complaint with the FCC or FTC.
The assigned code holder is T-MOBILE USA, INC., operating company number 6529, assigned August 27, 2015. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 206-634 | Seattle | QWEST CORPORATION |
| 206-635 | Seattle | CSC WIRELESS, LLC |
| 206-636 | Seattle | ADVANCED TELECOM SOLUTIONS, LLC |
| 206-638 | Seattle | IP HORIZON LLC |
| 206-639 | Seattle | ONVOY, LLC - WA |
| 206-640 | Seattle | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM |
FAQ
Where is 206-637 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 206-637 numbers?
T-MOBILE USA, INC. 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 206-637 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.