NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2019-03-27 575-206 0XXX2XXX which blocks → CSC WIRELESS, LLC 425J TEXICO NM
2019-03-27 640-777 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J ALLENTOWN NJ
2019-03-27 681-289 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BLUEFIELD WV
2019-03-27 720-927 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F LONGMONT CO
2019-03-27 725-217 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J LAUGHLIN NV
2019-03-27 757-551 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E BELLEHAVEN VA
2019-03-27 804-280 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F DELTAVILLE VA
2019-03-27 878-600 0–9 XXXall 10 · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J PTTSBGZON1 PA
2019-03-27 917-905 0–9 XXXwhole prefix which blocks → ONVOY, LLC- NY 384C NWYRCYZN11 NY
2019-03-27 928-419 0–9 XXXall 10 · 7 holders which blocks → CSC WIRELESS, LLC 425J FLAGSTAFF AZ
2019-03-27 938-766 0–9 XXXall 10 · 7 holders which blocks → CORETEL ALABAMA, INC. - AL 476F SYLACAUGA AL
2019-03-27 938-829 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → CORETEL ALABAMA, INC. - AL 476F PIEDMONT AL
2019-03-27 938-837 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CORETEL ALABAMA, INC. - AL 476F BOAZ AL
2019-03-26 217-290 0–9 XXXwhole prefix which blocks → ONVOY, LLC 224C RIVERTON IL
2019-03-26 351-247 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. 7135 LUNENBURG MA
2019-03-26 407-794 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E WINTERPARK FL
2019-03-26 413-305 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TC SYSTEMS, INC. 7135 SOUTHWICK MA
2019-03-26 417-702 7XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 BOLIVAR MO
2019-03-26 442-308 2XXX which blocks → CSC WIRELESS, LLC 425J JUNE LAKE CA
2019-03-26 470-602 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA NE GA
2019-03-26 475-476 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CT 639C BRIDGEPORT CT
2019-03-26 620-303 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - KS 986E HARTFORD KS
2019-03-26 681-264 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J ELKINS WV
2019-03-26 740-750 0XXX1XXX2XXX4XXX5XXX · 4 holders which blocks → CSC WIRELESS, LLC 425J LOWELL OH
2019-03-26 979-286 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J BRYAN TX
2019-03-25 220-203 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F ZANESVILLE OH
2019-03-25 412-844 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J PTTSBGZON8 PA
2019-03-25 478-337 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF GEORGIA, LLC - GA 909E MACON GA
2019-03-25 540-802 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MONTVALE VA
2019-03-25 647-421 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-03-25 647-422 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-03-25 647-423 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-03-25 647-594 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-03-25 681-216 0–9 XXXall 10 · 5 holders which blocks → CORETEL WEST VIRGINIA, INC. - WV 5833 ALLOY WV
2019-03-25 681-292 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J FLAT TOP WV
2019-03-25 743-222 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J GREENSBORO NC
2019-03-25 802-666 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J BURLINGTON VT
2019-03-25 803-598 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F ELLOREE SC
2019-03-25 910-998 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J WILMINGTON NC
2019-03-25 929-523 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2019-03-25 929-524 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN06 NY
2019-03-22 236-956 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2019-03-22 385-303 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2019-03-22 438-363 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-03-22 438-442 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-03-22 480-561 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2019-03-22 585-855 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → TERRA NOVA TELECOM INC. 145J BOLIVAR NY
2019-03-22 585-877 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J ROCHESTER NY
2019-03-22 607-866 6XXX which blocks → TERRA NOVA TELECOM INC. 145J BINGHAMTON NY
2019-03-22 647-653 not yet reported which blocks → Bell Mobility 6574 Toronto —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.