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
2013-04-30 437-580 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2013-04-30 470-247 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J ATLANTA NE GA
2013-04-30 506-247 not yet reported which blocks → TELUS Integrated Communications 2782 Fredericton —
2013-04-30 506-830 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Moncton —
2013-04-30 513-517 0–9 XXXwhole prefix which blocks → CINCINNATI BELL 9348 CINCINNATI OH
2013-04-30 720-589 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2013-04-30 813-517 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPACEN FL
2013-04-30 819-706 not yet reported which blocks → Bell Mobility 6574 Lebel-sur-Quevillon —
2013-04-29 312-801 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 551G CHICGOZN01 IL
2013-04-29 940-622 not yet reported which blocks → CHOICE WIRELESS, LC 3533 BOWIE TX
2013-04-27 830-243 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SEGUIN TX
2013-04-27 956-258 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 PHARR TX
2013-04-26 217-270 not yet reported which blocks → COMCAST IP PHONE, LLC 318J MT PULASKI IL
2013-04-26 267-406 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F DOYLESTOWN PA
2013-04-26 424-331 0–9 XXXall 10 · 9 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E INGLEWOOD CA
2013-04-26 440-426 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MIDDLEFLD OH
2013-04-26 470-545 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J ATLANTA NE GA
2013-04-26 484-408 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F ALLENTOWN PA
2013-04-26 574-327 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2013-04-26 581-821 not yet reported which blocks → TELUS Quebec 8083 Donnacona —
2013-04-26 581-822 not yet reported which blocks → TELUS Quebec 8083 Gaspe —
2013-04-26 581-823 not yet reported which blocks → TELUS Quebec 8083 Baie-Comeau (Hauterive) —
2013-04-26 581-824 not yet reported which blocks → TELUS Quebec 8083 Rimouski —
2013-04-26 581-825 not yet reported which blocks → TELUS Quebec 8083 Saint-Georges-de-Beauce —
2013-04-26 581-826 not yet reported which blocks → TELUS Quebec 8083 Sept-Iles —
2013-04-26 587-933 not yet reported which blocks → Bell West Inc. 2933 Calgary —
2013-04-26 615-454 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NASHVILLE TN
2013-04-26 778-897 not yet reported which blocks → Comwave Networks 160G Vancouver —
2013-04-26 843-481 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KINGSTREE SC
2013-04-26 903-688 not yet reported which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 FROST TX
2013-04-26 913-257 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2013-04-26 931-254 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 SPENCER TN
2013-04-26 940-617 not yet reported which blocks → CHOICE WIRELESS, LC 3533 WICHITAFLS TX
2013-04-26 940-620 not yet reported which blocks → CHOICE WIRELESS, LC 3533 BURKBURNTT TX
2013-04-26 940-624 not yet reported which blocks → CHOICE WIRELESS, LC 3533 HENRIETTA TX
2013-04-26 954-368 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J FTLAUDERDL FL
2013-04-26 954-544 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J HOLLYWOOD FL
2013-04-25 240-467 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J WSHNGTNZN4 MD
2013-04-25 414-595 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2013-04-25 414-865 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN4 WI
2013-04-25 512-593 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2013-04-25 561-557 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J WPALMBEACH FL
2013-04-25 587-430 not yet reported which blocks → Comwave Networks 160G Calgary —
2013-04-25 587-477 not yet reported which blocks → TELUS 8084 Fort McMurray —
2013-04-25 587-539 not yet reported which blocks → TELUS 8084 Fort McMurray —
2013-04-25 587-760 not yet reported which blocks → Comwave Networks 160G Edmonton —
2013-04-25 832-670 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HSTNSUBURB TX
2013-04-25 956-375 0–9 XXXall 10 · 3 holders which blocks → STPCS JOINT VENTURE, LLC 4290 WESLACO TX
2013-04-24 423-270 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 ERWIN TN
2013-04-24 646-679 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN01 NY

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.