NumberResearch Membership · Data 2026-04

Recent prefix assignments

5 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
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
2018-02-12 712-509 T-MOBILE USA, INC. 6529 SIOUX CITY IA
2018-02-06 681-621 T-MOBILE USA, INC. 6529 BLUEFIELD WV
2018-01-31 224-284 T-MOBILE USA, INC. 6529 DEERFIELD IL
2018-01-25 213-476 T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2018-01-18 650-402 T-MOBILE USA, INC. 6529 HALFMOONBY CA
2018-01-18 805-424 T-MOBILE USA, INC. 6529 SIMIVALLEY CA
2018-01-10 424-489 T-MOBILE USA, INC. 6529 SAN PEDRO CA
2018-01-08 209-219 T-MOBILE USA, INC. 6529 ATWATER CA
2018-01-08 909-470 T-MOBILE USA, INC. 6529 ARROWHEAD CA
2018-01-04 626-557 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-12-22 737-232 T-MOBILE USA, INC. 6529 ELGIN TX
2017-12-21 669-293 T-MOBILE USA, INC. 6529 SNJS NORTH CA
2017-12-14 657-355 T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2017-12-14 669-249 T-MOBILE USA, INC. 6529 SUNNYVALE CA
2017-12-14 817-630 T-MOBILE USA, INC. 6529 ARLINGTON TX
2017-12-04 469-350 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2017-11-22 858-214 T-MOBILE USA, INC. 6529 LA JOLLA CA
2017-11-06 682-259 T-MOBILE USA, INC. 6529 ARLINGTON TX
2017-10-25 214-892 T-MOBILE USA, INC. 6529 MCKINNEY TX
2017-10-25 539-609 T-MOBILE USA, INC. 6529 BARTLESVL OK
2017-10-23 234-237 T-MOBILE USA, INC. 6529 AKRON OH
2017-10-19 628-258 T-MOBILE USA, INC. 6529 NICASIO CA
2017-10-13 830-262 T-MOBILE USA, INC. 6529 MARBLE FLS TX
2017-10-12 682-258 T-MOBILE USA, INC. 6529 WEATHERFD TX
2017-10-10 217-790 T-MOBILE USA, INC. 6529 CHARLESTON IL
2017-08-30 720-845 T-MOBILE USA, INC. 6529 DENVER CO
2017-08-11 501-236 T-MOBILE USA, INC. 6529 SEARCY AR
2017-08-10 580-970 T-MOBILE USA, INC. 6529 ALTUS OK
2017-08-09 636-331 T-MOBILE USA, INC. 6529 FSSCRSTLCY MO
2017-08-04 406-402 T-MOBILE USA, INC. 6529 GREATFALLS MT
2017-08-02 406-561 T-MOBILE USA, INC. 6529 BILLINGS MT
2017-08-01 405-746 T-MOBILE USA, INC. 6529 SEMINOLE OK
2017-07-31 720-602 T-MOBILE USA, INC. 6529 DENVER CO
2017-07-28 626-366 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2017-07-20 737-221 T-MOBILE USA, INC. 6529 SAN MARCOS TX
2017-06-23 580-853 T-MOBILE USA, INC. 6529 DURANT OK
2017-06-08 442-219 T-MOBILE USA, INC. 6529 VICTORVL CA
2017-06-08 747-240 T-MOBILE USA, INC. 6529 GLENDALE CA
2017-06-01 219-216 T-MOBILE USA, INC. 6529 VALPARAISO IN
2017-06-01 219-217 T-MOBILE USA, INC. 6529 WESTVILLE IN
2017-06-01 618-217 T-MOBILE USA, INC. 6529 WOOD RIVER IL
2017-06-01 779-241 T-MOBILE USA, INC. 6529 MORRIS IL
2017-06-01 937-300 T-MOBILE USA, INC. 6529 EATON OH
2017-05-22 650-309 T-MOBILE USA, INC. 6529 HALFMOONBY CA
2017-05-22 858-209 T-MOBILE USA, INC. 6529 DEL MAR CA
2017-04-17 210-894 T-MOBILE USA, INC. 6529 SANANTONIO TX
2017-04-10 440-898 T-MOBILE USA, INC. 6529 PAINESVL OH
2017-04-07 323-880 T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2017-04-06 636-849 T-MOBILE USA, INC. 6529 OFALLON MO
2017-04-05 331-230 T-MOBILE USA, INC. 6529 AURORA IL

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.