NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2014-12-09 929-331 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2014-12-09 929-351 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2014-12-09 929-358 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NWYRCYZN03 NY
2014-12-09 929-363 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2014-12-09 929-424 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN08 NY
2014-12-08 240-623 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F WSHNGTNZN4 MD
2014-12-08 312-934 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2014-12-08 317-868 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 FRANKLIN IN
2014-12-08 318-570 0–9 XXXall 10 · 6 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 MONROE LA
2014-12-08 323-593 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2014-12-08 469-650 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 DALLAS TX
2014-12-08 475-208 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NORWALK CT
2014-12-08 480-494 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 7217 PHOENIX AZ
2014-12-08 504-513 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NEWORLEANS LA
2014-12-08 510-694 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C OKLD ALMD CA
2014-12-08 805-793 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C OXNARD CA
2014-12-08 862-271 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PATERSON NJ
2014-12-08 904-660 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 JACKSONVL FL
2014-12-05 289-513 not yet reported which blocks → Iristel Inc. 154E Bowmanville —
2014-12-05 289-514 not yet reported which blocks → Iristel Inc. 154E Thornhill —
2014-12-05 438-300 not yet reported which blocks → Iristel Inc. 154E Ste-Genevieve —
2014-12-05 579-440 not yet reported which blocks → Videotron Ltd. 8306 Frelighsburg —
2014-12-05 579-509 not yet reported which blocks → Iristel Inc. 154E St-Hyacinthe —
2014-12-05 579-809 not yet reported which blocks → Iristel Inc. 154E St-Bruno —
2014-12-05 651-571 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J STILLWATER MN
2014-12-05 669-256 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SARATOGA CA
2014-12-05 669-276 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2014-12-05 754-216 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J FTLAUDERDL FL
2014-12-05 858-239 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C SNDG MRMS CA
2014-12-05 909-672 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C HIGHLAND CA
2014-12-05 925-384 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C ANTIOCH CA
2014-12-04 206-966 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2014-12-04 321-430 0–9 XXXall 10 · 2 holders which blocks → METROPCS NETWORKS, LLC 899D ORLANDO FL
2014-12-04 561-614 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL 8664 WPALMBEACH FL
2014-12-04 608-496 0XXX1XXX4XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F CAMBRIDGE WI
2014-12-04 816-602 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 KANSASCITY MO
2014-12-03 289-598 not yet reported which blocks → TELUS Mobility 8303 Burlington —
2014-12-03 579-595 not yet reported which blocks → TELUS Mobility 8303 Granby —
2014-12-03 581-575 not yet reported which blocks → TELUS Mobility 8303 Grande-Vallee —
2014-12-03 682-315 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 EULESS TX
2014-12-03 682-712 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C ARLINGTON TX
2014-12-03 828-829 0–9 XXXall 10 · 6 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 RUTHEFRDTN NC
2014-12-03 865-413 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F CHESTNUTHI TN
2014-12-03 939-209 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2014-12-03 939-492 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 RIO GRANDE PR
2014-12-03 971-718 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 SALEM OR
2014-12-03 972-737 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ALLEN TX
2014-12-02 249-595 not yet reported which blocks → TELUS Mobility 8303 Barrie —
2014-12-02 507-570 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GREEN ISLE MN
2014-12-02 647-243 not yet reported which blocks → Fibernetics Corporation 464D Toronto —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.