NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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
2012-06-14 619-289 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2012-06-14 832-714 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2012-06-14 903-412 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SHIRLEY TX
2012-06-13 276-302 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CLINTWOOD VA
2012-06-13 352-300 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J OCALA FL
2012-06-13 469-315 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2012-06-13 502-822 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 LOUISVILLE KY
2012-06-13 509-821 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 DEER PARK WA
2012-06-13 571-375 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2012-06-13 702-721 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAS VEGAS NV
2012-06-13 731-741 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BROWNSVL TN
2012-06-13 859-469 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 LEXINGTON KY
2012-06-13 919-916 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 RALEIGH NC
2012-06-12 234-218 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F GARRETTSVL OH
2012-06-12 269-215 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E RICHLAND MI
2012-06-12 269-431 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E GALIEN MI
2012-06-12 512-774 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2012-06-12 586-315 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E NEW HAVEN MI
2012-06-11 216-239 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2012-06-11 267-300 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E PHPHSBZN43 PA
2012-06-11 401-409 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 CAROLINA RI
2012-06-11 413-307 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 ADAMS MA
2012-06-11 518-554 0–9 XXXall 10 · 6 holders which blocks → SLIC NETWORK SOLUTIONS, INC. - NY 193C TUPPERLAKE NY
2012-06-11 585-397 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ROCHESTER NY
2012-06-11 719-367 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D PEYTON CO
2012-06-11 814-376 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 5 holders which blocks → IDT AMERICA, CORP. - PA 213C PHILIPSBG PA
2012-06-11 918-570 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TAHLEQUAH OK
2012-06-11 918-863 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2012-06-11 918-871 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TAHLEQUAH OK
2012-06-11 978-541 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 ATHOL MA
2012-06-08 234-214 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2012-06-08 240-708 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 LAUREL238 MD
2012-06-08 289-832 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Maple —
2012-06-08 289-865 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Malton —
2012-06-08 423-268 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JOHNSON CY TN
2012-06-08 423-602 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G CHATTNOOGA TN
2012-06-08 438-382 not yet reported which blocks → Videotron Ltd. 8306 Montreal —
2012-06-08 438-494 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2012-06-08 604-427 not yet reported which blocks → Shaw Telecom Inc. 497E Langley —
2012-06-08 646-653 0–9 XXXall 10 · 3 holders which blocks → WIDE VOICE, LLC - NY 705G NWYRCYZN01 NY
2012-06-08 778-455 not yet reported which blocks → Shaw Telecom Inc. 497E Duncan —
2012-06-08 848-216 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 EMILLSTONE NJ
2012-06-08 915-215 0–9 XXXall 10 · 2 holders which blocks → SOUTHWESTERN BELL 9533 EL PASO TX
2012-06-07 253-545 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9638 AUBURN WA
2012-06-07 267-800 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E PHLDLPHZN1 PA
2012-06-07 269-224 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J BATTLE CRK MI
2012-06-07 302-401 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DE 4801 DOVER DE
2012-06-07 385-336 0–9 XXXall 10 · 4 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D LEHI UT
2012-06-07 424-283 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BEVERLYHLS CA
2012-06-07 484-999 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E W CHESTER PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.