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
206-251 T-MOBILE USA, INC. 6529 SEATTLE WA
206-252 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
206-253 WA
206-254 QWEST CORPORATION 9638 SEATTLE WA
206-255 T-MOBILE USA, INC. 6529 SEATTLE WA
206-256 QWEST CORPORATION 9638 SEATTLE WA
206-260 ONVOY, LLC - WA 483E SEATTLE WA
206-261 T-MOBILE USA, INC. 6529 SEATTLE WA
206-262 QWEST CORPORATION 9638 SEATTLE WA
206-263 QWEST CORPORATION 9638 SEATTLE WA
206-264 QWEST CORPORATION 9638 SEATTLE WA
206-265 QWEST CORPORATION 9638 SEATTLE WA
206-267 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
206-269 QWEST CORPORATION 9638 SEATTLE WA
206-270 QWEST CORPORATION 9638 SEATTLE WA
206-271 T-MOBILE USA, INC. 6529 SEATTLE WA
206-272 QWEST CORPORATION 9638 SEATTLE WA
206-273 QWEST CORPORATION 9638 SEATTLE WA
206-275 QWEST CORPORATION 9638 SEATTLE WA
206-276 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-277 QWEST CORPORATION 9638 SEATTLE WA
206-278 ONVOY, LLC - WA 483E SEATTLE WA
206-279 ONVOY, LLC - WA 483E SEATTLE WA
206-280 T-MOBILE USA, INC. 6529 SEATTLE WA
206-281 QWEST CORPORATION 9638 SEATTLE WA
206-282 QWEST CORPORATION 9638 SEATTLE WA
206-283 QWEST CORPORATION 9638 SEATTLE WA
206-284 QWEST CORPORATION 9638 SEATTLE WA
206-285 QWEST CORPORATION 9638 SEATTLE WA
206-286 QWEST CORPORATION 9638 SEATTLE WA
206-287 QWEST CORPORATION 9638 SEATTLE WA
206-288 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
206-289 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 RICHMNDBCH WA
206-290 T-MOBILE USA, INC. 6529 SEATTLE WA
206-291 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-292 QWEST CORPORATION 9638 SEATTLE WA
206-293 T-MOBILE USA, INC. 6529 SEATTLE WA
206-295 NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
206-296 QWEST CORPORATION 9638 SEATTLE WA
206-297 QWEST CORPORATION 9638 SEATTLE WA
206-298 QWEST CORPORATION 9638 SEATTLE WA
206-299 ONVOY, LLC - WA 483E SEATTLE WA
206-300 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
206-301 QWEST CORPORATION 9638 SEATTLE WA
206-302 QWEST CORPORATION 9638 SEATTLE WA
206-303 QWEST CORPORATION 9638 SEATTLE WA
206-306 QWEST CORPORATION 9638 SEATTLE WA
206-308 CORETEL WASHINGTON, INC. - WA 453J SEATTLE WA
206-309 ONVOY, LLC - WA 483E SEATTLE WA
206-310 NEW CINGULAR WIRELESS PCS, LLC 6010 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.