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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXAssigneeOCNRate centerState
2011-10-07 937-503 T-MOBILE USA, INC. 6529 DAYTON OH
2011-10-06 501-308 T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-09-30 909-343 T-MOBILE USA, INC. 6529 ARROWHEAD CA
2011-09-24 702-201 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2011-09-22 501-248 T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-09-20 513-302 T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-09-20 513-501 T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-09-19 385-242 T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-09-19 435-319 T-MOBILE USA, INC. 6529 ST GEORGE UT
2011-09-08 224-226 T-MOBILE USA, INC. 6529 NORTHBROOK IL
2011-09-08 224-261 T-MOBILE USA, INC. 6529 NORTHBROOK IL
2011-09-02 681-204 T-MOBILE USA, INC. 6529 HNTNGTNZN1 WV
2011-09-01 702-748 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2011-08-25 405-223 T-MOBILE USA, INC. 6529 OKLA CITY OK
2011-08-25 501-216 T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-08-22 331-225 T-MOBILE USA, INC. 6529 ELMHURST IL
2011-08-09 206-535 T-MOBILE USA, INC. 6529 SEATTLE WA
2011-08-09 253-283 T-MOBILE USA, INC. 6529 TACOMA WA
2011-08-09 415-316 T-MOBILE USA, INC. 6529 BELVEDERE CA
2011-08-09 720-499 T-MOBILE USA, INC. 6529 DENVER CO
2011-08-05 234-223 T-MOBILE USA, INC. 6529 WARREN OH
2011-08-04 513-394 T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-08-04 513-399 T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-08-02 312-459 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2011-08-02 501-444 T-MOBILE USA, INC. 6529 LITTLEROCK AR
2011-07-28 440-222 T-MOBILE USA, INC. 6529 LORAIN OH
2011-07-27 385-439 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2011-07-27 414-394 T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-07-27 708-545 T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-27 779-236 T-MOBILE USA, INC. 6529 KANKAKEE IL
2011-07-27 872-237 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-07-25 708-265 T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2011-07-25 760-848 T-MOBILE USA, INC. 6529 INDIO CA
2011-07-22 515-803 T-MOBILE USA, INC. 6529 DES MOINES IA
2011-07-22 626-586 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2011-07-22 714-576 T-MOBILE USA, INC. 6529 BUENA PARK CA
2011-07-22 720-612 T-MOBILE USA, INC. 6529 DENVER CO
2011-07-21 224-245 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2011-07-21 779-233 T-MOBILE USA, INC. 6529 JOLIET IL
2011-07-20 915-244 T-MOBILE USA, INC. 6529 EL PASO TX
2011-07-20 915-245 T-MOBILE USA, INC. 6529 EL PASO TX
2011-07-19 708-530 T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-19 872-226 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-07-18 224-237 T-MOBILE USA, INC. 6529 WAUKEGAN IL
2011-07-15 469-268 T-MOBILE USA, INC. 6529 FRISCO TX
2011-07-12 331-220 T-MOBILE USA, INC. 6529 AURORA IL
2011-07-11 224-235 T-MOBILE USA, INC. 6529 NORTHBROOK IL
2011-07-11 331-200 T-MOBILE USA, INC. 6529 BARTLETT IL
2011-07-11 918-565 T-MOBILE USA, INC. 6529 TULSA OK
2011-07-08 312-434 T-MOBILE USA, INC. 6529 CHICGOZN01 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.