NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2021-11-04 251-522 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AL 604E COFFEEVL AL
2021-11-04 251-566 0XXX1XXX5XXX6XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H GOSPORT AL
2021-11-04 252-374 0XXX1XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E HERTFORD NC
2021-11-04 252-490 0XXX1XXX2XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E COLERAIN NC
2021-11-04 302-587 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - DE 073F HARRINGTON DE
2021-11-04 318-831 0XXX1XXX2XXX4XXX8XXX · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ST LANDRY LA
2021-11-04 346-524 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J HSTNSUBURB TX
2021-11-04 352-737 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BROOKSVL FL
2021-11-04 380-240 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 DUBLIN OH
2021-11-04 386-324 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → HD CARRIER LLC 321J LAKE CITY FL
2021-11-04 447-225 0XXX2XXX5XXX · 2 holders which blocks → ONVOY, LLC 224C VERMILION IL
2021-11-04 463-262 0XXX1XXX2XXX3XXX6XXX · 2 holders which blocks → ONVOY, LLC - IN 097D PITTSBORO IN
2021-11-04 464-222 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MOKENA IL
2021-11-04 464-999 0XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H THORNTON IL
2021-11-04 507-804 0XXX1XXX2XXX3XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 WORTHINGTN MN
2021-11-04 507-805 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 FARIBAULT MN
2021-11-04 507-806 6XXX9XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 FAIRMONT MN
2021-11-04 574-384 0XXX1XXX4XXX5XXX9XXX which blocks → ONVOY, LLC - IN 097D KNOX IN
2021-11-04 615-698 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F SPRINGFLD TN
2021-11-04 620-559 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - KS 205F EUREKA KS
2021-11-04 629-271 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GOODLETSVL TN
2021-11-04 657-532 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-11-04 657-553 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C SANTA ANA CA
2021-11-04 659-248 0XXX1XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F YORK AL
2021-11-04 659-249 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F CARBONHILL AL
2021-11-04 659-250 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F CALERA AL
2021-11-04 669-338 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C CAMPBELL CA
2021-11-04 725-267 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2021-11-04 725-268 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LAUGHLIN NV
2021-11-04 726-216 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C SANANTONIO TX
2021-11-04 737-310 0–9 XXXall 10 · 7 holders which blocks → HD CARRIER LLC 321J WIMBERLEY TX
2021-11-04 765-804 2XXX4XXX7XXX · 3 holders which blocks → ONVOY, LLC - IN 097D FILLMORE IN
2021-11-04 779-343 0XXX3XXX4XXX · 3 holders which blocks → ONVOY, LLC 224C GERMAN VLY IL
2021-11-04 779-344 0XXX3XXX4XXX5XXX · 3 holders which blocks → ONVOY, LLC 224C SEWARD IL
2021-11-04 779-347 0XXX1XXX7XXX · 3 holders which blocks → ONVOY, LLC 224C WINSLOW IL
2021-11-04 872-297 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-11-04 951-592 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C RIVERSIDE CA
2021-11-04 951-875 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C BANNING CA
2021-11-04 954-819 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 FTLAUDERDL FL
2021-11-04 972-688 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J PLANO TX
2021-11-03 206-791 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
2021-11-03 213-586 0–9 XXXwhole prefix which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2021-11-03 213-594 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 06 CA
2021-11-03 213-638 0–9 XXXwhole prefix which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 10 CA
2021-11-03 231-397 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MANISTEE MI
2021-11-03 269-391 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 KALAMAZOO MI
2021-11-03 307-384 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H AFTON WY
2021-11-03 313-612 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-11-03 385-446 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-03 445-227 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA

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.