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
2018-12-06 469-588 T-MOBILE USA, INC. 6529 FRISCO TX
2018-12-05 628-264 T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-12-04 385-286 T-MOBILE USA, INC. 6529 PROVO UT
2018-11-26 209-519 T-MOBILE USA, INC. 6529 LOS BANOS CA
2018-11-13 425-428 T-MOBILE USA, INC. 6529 ISSAQUAH WA
2018-11-12 720-828 T-MOBILE USA, INC. 6529 DENVER CO
2018-11-01 681-250 T-MOBILE USA, INC. 6529 PINEVILLE WV
2018-10-31 234-259 T-MOBILE USA, INC. 6529 TWINSBURG OH
2018-10-31 405-851 T-MOBILE USA, INC. 6529 SEMINOLE OK
2018-10-31 573-507 T-MOBILE USA, INC. 6529 COLUMBIA MO
2018-10-31 580-344 T-MOBILE USA, INC. 6529 ADA OK
2018-10-31 608-901 T-MOBILE USA, INC. 6529 JANESVILLE WI
2018-10-29 539-629 T-MOBILE USA, INC. 6529 TULSA OK
2018-10-23 234-257 T-MOBILE USA, INC. 6529 MONTROSE OH
2018-10-23 253-527 T-MOBILE USA, INC. 6529 TACOMA WA
2018-10-22 224-295 T-MOBILE USA, INC. 6529 PALATINE IL
2018-10-19 224-294 T-MOBILE USA, INC. 6529 LIBERTYVL IL
2018-10-19 331-242 T-MOBILE USA, INC. 6529 LOMBARD IL
2018-10-19 331-243 T-MOBILE USA, INC. 6529 LOMBARD IL
2018-10-19 331-246 T-MOBILE USA, INC. 6529 LEMONT IL
2018-10-18 217-926 T-MOBILE USA, INC. 6529 ARCOLA IL
2018-10-18 219-257 T-MOBILE USA, INC. 6529 CROWNPOINT IN
2018-10-18 870-517 T-MOBILE USA, INC. 6529 HARRISON AR
2018-10-15 479-352 T-MOBILE USA, INC. 6529 ALMA AR
2018-10-15 479-370 T-MOBILE USA, INC. 6529 ALMA AR
2018-10-11 970-973 T-MOBILE USA, INC. 6529 GLENWD SPG CO
2018-10-05 360-228 T-MOBILE USA, INC. 6529 BREMERTON WA
2018-10-04 309-506 T-MOBILE USA, INC. 6529 ROCKISLAND IL
2018-09-21 469-558 T-MOBILE USA, INC. 6529 ENNIS TX
2018-09-20 206-665 T-MOBILE USA, INC. 6529 SEATTLE WA
2018-09-18 657-365 T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2018-09-17 725-208 T-MOBILE USA, INC. 6529 LAUGHLIN NV
2018-09-14 669-240 T-MOBILE USA, INC. 6529 LOS GATOS CA
2018-09-14 909-516 T-MOBILE USA, INC. 6529 CHINO CA
2018-09-13 971-341 T-MOBILE USA, INC. 6529 TILLAMOOK OR
2018-09-04 626-479 T-MOBILE USA, INC. 6529 COVINA CA
2018-08-31 405-934 T-MOBILE USA, INC. 6529 OKLA CITY OK
2018-08-30 682-272 T-MOBILE USA, INC. 6529 ARLINGTON TX
2018-08-29 469-542 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2018-08-27 234-250 T-MOBILE USA, INC. 6529 AKRON OH
2018-08-27 319-300 T-MOBILE USA, INC. 6529 WATERLOO IA
2018-08-27 970-473 T-MOBILE USA, INC. 6529 GREELEY CO
2018-08-23 501-290 T-MOBILE USA, INC. 6529 SEARCY AR
2018-08-20 469-504 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2018-08-15 425-389 T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-08-15 515-815 T-MOBILE USA, INC. 6529 AMES IA
2018-08-10 870-497 T-MOBILE USA, INC. 6529 JONESBORO AR
2018-08-08 650-420 T-MOBILE USA, INC. 6529 PACIFICA CA
2018-08-06 971-335 T-MOBILE USA, INC. 6529 CLACKAMAS OR
2018-07-23 319-280 T-MOBILE USA, INC. 6529 KEOSAUQUA 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.