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
206-311 MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
206-312 ONVOY, LLC - WA 483E BAINBDG IS WA
206-313 T-MOBILE USA, INC. 6529 SEATTLE WA
206-314 SPOK, INC. 6630 SEATTLE WA
206-315 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
206-316 TELNYX LLC 073H SEATTLE WA
206-318 QWEST CORPORATION 9638 SEATTLE WA
206-319 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BAINBDG IS WA
206-320 QWEST CORPORATION 9638 SEATTLE WA
206-321 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-322 QWEST CORPORATION 9638 SEATTLE WA
206-323 QWEST CORPORATION 9638 SEATTLE WA
206-324 QWEST CORPORATION 9638 SEATTLE WA
206-325 QWEST CORPORATION 9638 SEATTLE WA
206-326 QWEST CORPORATION 9638 SEATTLE WA
206-327 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-328 QWEST CORPORATION 9638 SEATTLE WA
206-329 QWEST CORPORATION 9638 SEATTLE WA
206-330 LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
206-331 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-332 QWEST CORPORATION 9638 SEATTLE WA
206-333 ONVOY, LLC - WA 483E SEATTLE WA
206-334 T-MOBILE USA, INC. 6529 SEATTLE WA
206-335 T-MOBILE USA, INC. 6529 SEATTLE WA
206-336 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
206-337 ONVOY, LLC - WA 483E SEATTLE WA
206-338 ONVOY, LLC - WA 483E SEATTLE WA
206-339 ONVOY, LLC - WA 483E SEATTLE WA
206-340 QWEST CORPORATION 9638 SEATTLE WA
206-341 QWEST CORPORATION 9638 SEATTLE WA
206-342 QWEST CORPORATION 9638 SEATTLE WA
206-343 QWEST CORPORATION 9638 SEATTLE WA
206-344 QWEST CORPORATION 9638 SEATTLE WA
206-345 QWEST CORPORATION 9638 SEATTLE WA
206-346 QWEST CORPORATION 9638 SEATTLE WA
206-347 LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BAINBDG IS WA
206-349 T-MOBILE USA, INC. 6529 SEATTLE WA
206-350 ONVOY, LLC - WA 483E SEATTLE WA
206-351 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-352 QWEST CORPORATION 9638 SEATTLE WA
206-353 T-MOBILE USA, INC. 6529 SEATTLE WA
206-354 T-MOBILE USA, INC. 6529 SEATTLE WA
206-355 T-MOBILE USA, INC. 6529 SEATTLE WA
206-356 T-MOBILE USA, INC. 6529 SEATTLE WA
206-357 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
206-358 QWEST CORPORATION 9638 SEATTLE WA
206-359 QWEST CORPORATION 9638 SEATTLE WA
206-361 QWEST CORPORATION 9638 SEATTLE WA
206-362 QWEST CORPORATION 9638 SEATTLE WA
206-363 QWEST CORPORATION 9638 SEATTLE 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.