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
2014-09-08 323-688 T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2014-09-08 909-582 T-MOBILE USA, INC. 6529 ARROWHEAD CA
2014-09-03 626-693 T-MOBILE USA, INC. 6529 ARCADIA CA
2014-09-03 657-246 T-MOBILE USA, INC. 6529 BREA CA
2014-09-02 224-386 T-MOBILE USA, INC. 6529 PALATINE IL
2014-09-02 415-980 T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2014-09-02 669-220 T-MOBILE USA, INC. 6529 SNJS WEST CA
2014-09-01 719-415 T-MOBILE USA, INC. 6529 PUEBLO CO
2014-08-29 385-539 T-MOBILE USA, INC. 6529 PROVO UT
2014-08-29 385-831 T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-08-29 425-499 T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-08-29 541-801 T-MOBILE USA, INC. 6529 ALBANY OR
2014-08-29 808-304 T-MOBILE USA, INC. 6529 HONOLULU HI
2014-08-28 682-307 T-MOBILE USA, INC. 6529 ARLINGTON TX
2014-08-26 469-618 T-MOBILE USA, INC. 6529 FRISCO TX
2014-08-26 469-740 T-MOBILE USA, INC. 6529 FRISCO TX
2014-08-26 515-305 T-MOBILE USA, INC. 6529 DES MOINES IA
2014-08-26 859-287 T-MOBILE USA, INC. 6529 COVINGTON KY
2014-08-25 720-492 T-MOBILE USA, INC. 6529 DENVER CO
2014-08-22 312-483 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2014-08-22 312-522 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2014-08-22 312-866 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2014-08-22 440-485 T-MOBILE USA, INC. 6529 CHAGRINFLS OH
2014-08-22 937-931 T-MOBILE USA, INC. 6529 DAYTON OH
2014-08-21 415-792 T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2014-08-21 424-362 T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2014-08-20 501-502 T-MOBILE USA, INC. 6529 LITTLEROCK AR
2014-08-19 385-238 T-MOBILE USA, INC. 6529 OGDEN UT
2014-08-19 520-257 T-MOBILE USA, INC. 6529 TUCSON AZ
2014-08-18 208-971 T-MOBILE USA, INC. 6529 BOISE ID
2014-08-18 909-541 T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-08-12 210-907 T-MOBILE USA, INC. 6529 SANANTONIO TX
2014-08-12 512-893 T-MOBILE USA, INC. 6529 AUSTIN TX
2014-08-04 619-496 T-MOBILE USA, INC. 6529 SNDG SNDG CA
2014-07-25 224-830 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2014-07-25 580-290 T-MOBILE USA, INC. 6529 WOODWARD OK
2014-07-22 915-229 T-MOBILE USA, INC. 6529 EL PASO TX
2014-07-22 971-325 T-MOBILE USA, INC. 6529 PORTLAND OR
2014-07-21 224-508 T-MOBILE USA, INC. 6529 ELGIN IL
2014-07-21 415-960 T-MOBILE USA, INC. 6529 BELVEDERE CA
2014-07-21 626-624 T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-07-21 626-734 T-MOBILE USA, INC. 6529 ARCADIA CA
2014-07-21 626-861 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2014-07-18 385-231 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-07-18 808-726 T-MOBILE USA, INC. 6529 HONOLULU HI
2014-07-17 775-440 T-MOBILE USA, INC. 6529 RENO NV
2014-07-16 224-818 T-MOBILE USA, INC. 6529 ROUND LAKE IL
2014-07-16 331-254 T-MOBILE USA, INC. 6529 SUGARGROVE IL
2014-07-14 720-767 T-MOBILE USA, INC. 6529 DENVER CO
2014-06-30 669-237 T-MOBILE USA, INC. 6529 CAMPBELL CA

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.