NumberResearch Membership · Data 2026-04

Recent prefix assignments

380 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.

Most active assignees, last 30 days
8X8, INC. 38
ONVOY, LLC - CA 37
NEW CINGULAR WIRELESS PCS, LLC - IL 33
NEW CINGULAR WIRELESS PCS, LLC - DC 30
ONVOY, LLC - TX 18
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXAssigneeOCNRate centerState
206-364 QWEST CORPORATION 9638 SEATTLE WA
206-365 QWEST CORPORATION 9638 SEATTLE WA
206-366 QWEST CORPORATION 9638 SEATTLE WA
206-367 QWEST CORPORATION 9638 SEATTLE WA
206-368 QWEST CORPORATION 9638 SEATTLE WA
206-369 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-370 QWEST CORPORATION 9638 SEATTLE WA
206-371 T-MOBILE USA, INC. 6529 SEATTLE WA
206-372 T-MOBILE USA, INC. 6529 SEATTLE WA
206-373 QWEST CORPORATION 9638 SEATTLE WA
206-374 QWEST CORPORATION 9638 SEATTLE WA
206-375 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-376 T-MOBILE USA, INC. 6529 SEATTLE WA
206-377 QWEST CORPORATION 9638 SEATTLE WA
206-378 QWEST CORPORATION 9638 SEATTLE WA
206-380 T-MOBILE USA, INC. 6529 SEATTLE WA
206-381 QWEST CORPORATION 9638 SEATTLE WA
206-382 QWEST CORPORATION 9638 SEATTLE WA
206-383 T-MOBILE USA, INC. 6529 SEATTLE WA
206-384 LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
206-386 QWEST CORPORATION 9638 SEATTLE WA
206-387 T-MOBILE USA, INC. 6529 SEATTLE WA
206-388 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
206-389 QWEST CORPORATION 9638 SEATTLE WA
206-390 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-391 T-MOBILE USA, INC. 6529 SEATTLE WA
206-394 QWEST CORPORATION 9638 SEATTLE WA
206-396 T-MOBILE USA, INC. 6529 SEATTLE WA
206-397 T-MOBILE USA, INC. 6529 SEATTLE WA
206-398 QWEST CORPORATION 9638 SEATTLE WA
206-399 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-403 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
206-404 QWEST CORPORATION 9638 SEATTLE WA
206-405 QWEST CORPORATION 9638 SEATTLE WA
206-406 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-407 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
206-408 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 VASHON WA
206-409 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-410 QWEST CORPORATION 9638 SEATTLE WA
206-411 MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
206-412 T-MOBILE USA, INC. 6529 SEATTLE WA
206-415 ONVOY, LLC - WA 483E SEATTLE WA
206-416 QWEST CORPORATION 9638 SEATTLE WA
206-417 QWEST CORPORATION 9638 SEATTLE WA
206-418 QWEST CORPORATION 9638 SEATTLE WA
206-419 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-421 QWEST CORPORATION 9638 SEATTLE WA
206-423 T-MOBILE USA, INC. 6529 SEATTLE WA
206-424 ONVOY, LLC - WA 483E SEATTLE WA
206-425 WA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.