NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
2011-03-07 417-413 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD MO
2011-03-07 480-256 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2011-03-07 484-219 0–9 XXXall 10 · 2 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
2011-03-07 506-821 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Clair —
2011-03-07 506-822 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Baker Brook —
2011-03-07 506-823 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Sainte-Anne-de-Madawaska —
2011-03-07 506-824 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B St. Leonard —
2011-03-07 506-825 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B New Denmark —
2011-03-07 509-759 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 YAKIMA WA
2011-03-07 604-497 not yet reported which blocks → Shaw Telecom Inc. 497E Whalley —
2011-03-07 716-253 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 BUFFALO NY
2011-03-07 716-255 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 TONAWANDA NY
2011-03-07 717-224 0–9 XXXall 10 · 4 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 LANCASTER PA
2011-03-07 717-758 0–9 XXXwhole prefix which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 YORK PA
2011-03-07 724-393 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 NEWKNSNGTN PA
2011-03-07 816-301 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY MO
2011-03-04 347-889 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
2011-03-04 347-899 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN05 NY
2011-03-04 412-689 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 PTTSBGZON1 PA
2011-03-04 484-635 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 BETHLEHEM PA
2011-03-04 845-263 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NEW CITY NY
2011-03-04 860-856 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J HARTFORD CT
2011-03-03 204-818 not yet reported which blocks → Iristel Inc. 154E Oakbank —
2011-03-03 224-733 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 WAUKEGAN IL
2011-03-03 224-800 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2011-03-03 270-370 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J ELIZABTHTN KY
2011-03-03 438-394 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2011-03-03 502-617 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C CHAPLIN KY
2011-03-03 570-661 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WASHIGTNVL PA
2011-03-03 581-984 not yet reported which blocks → Videotron Ltd. 328F Quebec —
2011-03-03 647-725 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Toronto —
2011-03-03 701-718 none assigned yet which blocks → MLGC, L.L.C. - ND 287G KINDRED ND
2011-03-03 702-601 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2011-03-03 860-709 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
2011-03-03 860-924 0–9 XXXall 10 · 4 holders which blocks → YMAX COMMUNICATIONS CORP. - CT 350E HARTFORD CT
2011-03-03 919-514 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OXFORD NC
2011-03-02 201-749 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RAMSEY NJ
2011-03-02 201-912 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JERSEYCITY NJ
2011-03-02 270-387 0XXX1XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C BENTON KY
2011-03-02 343-369 not yet reported which blocks → TELUS Mobility 8303 Pembroke —
2011-03-02 438-392 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2011-03-02 515-318 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 DES MOINES IA
2011-03-02 559-666 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
2011-03-02 581-983 not yet reported which blocks → Videotron Ltd. 328F Quebec —
2011-03-02 606-289 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C FREEBURN KY
2011-03-02 618-408 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C BECKEMEYER IL
2011-03-02 678-308 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA
2011-03-02 763-400 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 TWINCITIES MN
2011-03-02 778-212 not yet reported which blocks → TELUS Mobility 8301 Vernon —
2011-03-02 812-807 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C HELTONVL IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.