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
2004-11-15 469-544 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2004-11-12 575-602 T-MOBILE USA, INC. 6529 HOBBS NM
2004-11-08 310-654 T-MOBILE USA, INC. 6529 INGLEWOOD CA
2004-11-04 574-808 T-MOBILE USA, INC. 6529 MONTICELLO IN
2004-11-04 937-670 T-MOBILE USA, INC. 6529 GREENVILLE OH
2004-10-29 408-627 T-MOBILE USA, INC. 6529 SNJS NORTH CA
2004-10-13 630-618 T-MOBILE USA, INC. 6529 AURORA IL
2004-10-13 773-494 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-10-13 773-512 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-28 773-499 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-24 773-366 T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-09-22 928-310 T-MOBILE USA, INC. 6529 FLAGSTAFF AZ
2004-09-22 928-420 T-MOBILE USA, INC. 6529 PRESCOTT AZ
2004-09-22 928-451 T-MOBILE USA, INC. 6529 SEDONA AZ
2004-09-17 503-664 T-MOBILE USA, INC. 6529 BEAVER OR
2004-09-10 469-226 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2004-09-09 469-212 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2004-09-07 773-414 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-08-25 480-275 T-MOBILE USA, INC. 6529 PHOENIX AZ
2004-08-20 630-201 T-MOBILE USA, INC. 6529 NAPERVILLE IL
2004-08-18 432-599 T-MOBILE USA, INC. 6529 MIDLAND TX
2004-08-12 435-621 T-MOBILE USA, INC. 6529 VERNAL UT
2004-08-04 406-451 T-MOBILE USA, INC. 6529 BOZEMAN MT
2004-08-03 406-218 T-MOBILE USA, INC. 6529 MISSOULA MT
2004-08-02 469-826 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2004-07-20 630-701 T-MOBILE USA, INC. 6529 AURORA IL
2004-07-20 773-600 T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-07-14 702-403 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2004-07-06 217-565 T-MOBILE USA, INC. 6529 TAYLORVL IL
2004-06-23 513-291 T-MOBILE USA, INC. 6529 SEVEN MILE OH
2004-06-17 806-332 T-MOBILE USA, INC. 6529 LAMESA TX
2004-06-09 773-387 T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-05-19 360-622 T-MOBILE USA, INC. 6529 SAN JUAN WA
2004-05-13 319-202 T-MOBILE USA, INC. 6529 CEDAR RPDS IA
2004-05-10 909-561 T-MOBILE USA, INC. 6529 FONTANA CA
2004-04-27 630-849 T-MOBILE USA, INC. 6529 AURORA IL
2004-04-26 971-275 T-MOBILE USA, INC. 6529 PORTLAND OR
2004-03-29 219-484 T-MOBILE USA, INC. 6529 GARY IN
2004-03-22 773-310 T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2004-03-10 210-204 T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-03-01 414-446 T-MOBILE USA, INC. 6529 MILWAUKZN4 WI
2004-02-27 847-890 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2004-02-24 940-882 T-MOBILE USA, INC. 6529 WICHITAFLS TX
2004-01-27 501-442 T-MOBILE USA, INC. 6529 LITTLEROCK AR
2004-01-21 630-392 T-MOBILE USA, INC. 6529 NAPERVILLE IL
2004-01-07 815-616 T-MOBILE USA, INC. 6529 FREEPORT IL
2003-12-16 340-332 T-MOBILE USA, INC. 6529 ST CROIX VI
2003-11-26 574-356 T-MOBILE USA, INC. 6529 NAPPANEE IN
2003-11-25 575-545 T-MOBILE USA, INC. 6529 DEMING NM
2003-11-10 309-336 T-MOBILE USA, INC. 6529 BLOOMINGTN 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.