NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-12-09 431-453 not yet reported which blocks → Fibernetics Corporation 464D Elie —
2021-12-09 431-454 not yet reported which blocks → Fibernetics Corporation 464D Macgregor —
2021-12-09 515-945 1XXX2XXX3XXX4XXX · 3 holders which blocks → AUREON COMMUNICATIONS, LLC 444G RANDALL IA
2021-12-09 539-268 0XXX1XXX8XXX · 3 holders which blocks → CROSS CABLE TELEVISION, LLC - OK 809H SKIATOOK OK
2021-12-09 539-289 0XXX1XXX7XXX8XXX · 4 holders which blocks → CROSS CABLE TELEVISION, LLC - OK 809H DRUMRIGHT OK
2021-12-09 619-975 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DULZURA CA
2021-12-09 747-441 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C GLENDALE CA
2021-12-09 913-414 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 GARDNER KS
2021-12-09 959-236 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HARTFORD CT
2021-12-09 989-431 3XXX4XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CASS CITY MI
2021-12-08 209-864 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2021-12-08 209-901 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C STOCKTON CA
2021-12-08 223-272 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 GETTYSBURG PA
2021-12-08 223-285 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 MECHANCSBG PA
2021-12-08 272-280 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 SAYLORSBG PA
2021-12-08 272-283 0XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 MILL HALL PA
2021-12-08 272-291 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 TAMAQUA PA
2021-12-08 305-452 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E NORTH DADE FL
2021-12-08 314-940 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ST LOUIS MO
2021-12-08 314-967 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LADUE MO
2021-12-08 319-539 3XXX which blocks → ONVOY, LLC - IA 221F RIVERSIDE IA
2021-12-08 445-229 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 YARDLEY PA
2021-12-08 445-232 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2021-12-08 478-350 1XXX2XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BARTOW GA
2021-12-08 501-498 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LITTLEROCK AR
2021-12-08 513-949 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 WAYNESVL OH
2021-12-08 515-581 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → UNITED STATES CELLULAR - IA 6266 ADEL IA
2021-12-08 516-995 0–9 XXXall 10 · 5 holders which blocks → BARR TELL USA, INC. - NY 525G NASSAUZN03 NY
2021-12-08 540-934 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E BLACKSBURG VA
2021-12-08 540-938 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MINERAL VA
2021-12-08 561-785 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WPALMBEACH FL
2021-12-08 605-604 0XXX which blocks → MIDCO VOICE, LLC 858J BRANDON SD
2021-12-08 610-472 0XXX1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 PHPHSBZN17 PA
2021-12-08 640-226 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F LAWRENCEVL NJ
2021-12-08 641-341 4XXX which blocks → ONVOY, LLC - IA 221F THORNTON IA
2021-12-08 660-387 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WESTVILLE MO
2021-12-08 661-625 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SNCA NHCS CA
2021-12-08 712-414 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E RED OAK IA
2021-12-08 747-306 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GLENDALE CA
2021-12-08 757-731 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J NRFOLKZON2 VA
2021-12-08 813-937 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TAMPAWST FL
2021-12-08 813-939 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TAMPACEN FL
2021-12-08 816-409 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLUE SPG MO
2021-12-08 830-380 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C BULVERDE TX
2021-12-08 857-394 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELMONT MA
2021-12-08 862-392 0XXX which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F ERSKINELKS NJ
2021-12-08 939-324 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NARANJITO PR
2021-12-08 939-371 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 CAROLINA PR
2021-12-08 949-708 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 IRVINE CA
2021-12-08 985-349 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F FOLSOM LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.