NumberResearch Membership · Data 09/18/2026

Recent prefix assignments

5 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026

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
T-MOBILE USA, INC. 5
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
2018-06-28 725-206 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2018-06-13 681-234 T-MOBILE USA, INC. 6529 CHRLSTNZN6 WV
2018-06-13 681-297 T-MOBILE USA, INC. 6529 PRKRSBGZN3 WV
2018-06-13 681-381 T-MOBILE USA, INC. 6529 CHRLSTNZN3 WV
2018-06-13 681-387 T-MOBILE USA, INC. 6529 CHRLSTNZN2 WV
2018-06-13 681-432 T-MOBILE USA, INC. 6529 HNTNGTNZN1 WV
2018-06-13 681-505 T-MOBILE USA, INC. 6529 CHRLSTNZN4 WV
2018-06-13 681-588 T-MOBILE USA, INC. 6529 PRKRSBGZN1 WV
2018-06-13 681-689 T-MOBILE USA, INC. 6529 HNTNGTNZN4 WV
2018-06-12 309-350 T-MOBILE USA, INC. 6529 ROCKISLAND IL
2018-06-12 951-518 T-MOBILE USA, INC. 6529 MORENO CA
2018-05-08 385-955 T-MOBILE USA, INC. 6529 SALT LAKE UT
2018-05-01 681-385 T-MOBILE USA, INC. 6529 CHRLSTNZN1 WV
2018-04-26 214-836 T-MOBILE USA, INC. 6529 MCKINNEY TX
2018-04-17 469-468 T-MOBILE USA, INC. 6529 FRISCO TX
2018-04-17 469-469 T-MOBILE USA, INC. 6529 FRISCO TX
2018-04-16 805-670 T-MOBILE USA, INC. 6529 OXNARD CA
2018-04-11 442-280 T-MOBILE USA, INC. 6529 BARSTOW CA
2018-04-11 510-609 T-MOBILE USA, INC. 6529 RICHMOND CA
2018-04-10 425-624 T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-04-09 669-467 T-MOBILE USA, INC. 6529 SUNNYVALE CA
2018-04-05 469-465 T-MOBILE USA, INC. 6529 FRISCO TX
2018-03-29 405-490 T-MOBILE USA, INC. 6529 ANADARKO OK
2018-03-29 442-279 T-MOBILE USA, INC. 6529 BRAWLEY CA
2018-03-29 479-337 T-MOBILE USA, INC. 6529 ROGERS AR
2018-03-29 657-319 T-MOBILE USA, INC. 6529 FULLERTON CA
2018-03-22 720-827 T-MOBILE USA, INC. 6529 DENVER CO
2018-03-22 805-519 T-MOBILE USA, INC. 6529 ARROYOGRND CA
2018-03-21 479-332 T-MOBILE USA, INC. 6529 FAYETTEVL AR
2018-03-21 479-334 T-MOBILE USA, INC. 6529 SPRINGDALE AR
2018-03-21 501-273 T-MOBILE USA, INC. 6529 CONWAY AR
2018-03-16 712-699 T-MOBILE USA, INC. 6529 WALL LAKE IA
2018-03-14 479-329 T-MOBILE USA, INC. 6529 ALMA AR
2018-03-09 319-419 T-MOBILE USA, INC. 6529 WAVERLY IA
2018-03-09 712-381 T-MOBILE USA, INC. 6529 ROCKRAPIDS IA
2018-03-09 720-819 T-MOBILE USA, INC. 6529 DENVER CO
2018-03-08 707-920 T-MOBILE USA, INC. 6529 FRFLD-SUIS CA
2018-03-08 712-538 T-MOBILE USA, INC. 6529 POCAHONTAS IA
2018-03-08 712-798 T-MOBILE USA, INC. 6529 GEORGE IA
2018-03-08 817-936 T-MOBILE USA, INC. 6529 ARLINGTON TX
2018-03-07 515-719 T-MOBILE USA, INC. 6529 TITONKA IA
2018-03-07 515-744 T-MOBILE USA, INC. 6529 RADCLIFFE IA
2018-03-06 515-385 T-MOBILE USA, INC. 6529 CLARION IA
2018-03-06 515-902 T-MOBILE USA, INC. 6529 HUMBOLDT IA
2018-03-06 641-548 T-MOBILE USA, INC. 6529 MASON CITY IA
2018-03-06 641-808 T-MOBILE USA, INC. 6529 COLO IA
2018-03-02 712-686 T-MOBILE USA, INC. 6529 SCRANTON IA
2018-02-27 779-250 T-MOBILE USA, INC. 6529 STERLING IL
2018-02-12 319-412 T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2018-02-12 563-396 T-MOBILE USA, INC. 6529 DAVENPORT IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.