NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
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
2012-10-18 581-301 not yet reported which blocks → Telecommunications Xittel Inc 247F Tete-a-la-Baleine —
2012-10-18 581-302 not yet reported which blocks → Telecommunications Xittel Inc 247F Saint-Augustin (Duplessis) —
2012-10-18 581-303 not yet reported which blocks → Telecommunications Xittel Inc 247F Sept-Iles —
2012-10-18 581-304 not yet reported which blocks → Telecommunications Xittel Inc 247F Riviere-au-Tonnerre —
2012-10-18 786-509 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2012-10-18 786-516 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2012-10-18 972-885 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G DALLAS TX
2012-10-17 208-501 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 551G BOISE ID
2012-10-17 262-777 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN2 WI
2012-10-17 302-203 0–9 XXXall 10 · 4 holders which blocks → VERIZON DELAWARE, INC. 9210 MIDDLETOWN DE
2012-10-17 505-395 0–9 XXXall 10 · 8 holders which blocks → NUSO, LLC 551G SANTA FE NM
2012-10-17 512-920 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G AUSTIN TX
2012-10-17 581-284 not yet reported which blocks → Telecommunications Xittel Inc 247F Riviere-Saint-Jean —
2012-10-17 581-285 not yet reported which blocks → Telecommunications Xittel Inc 247F Port-Cartier —
2012-10-17 581-286 not yet reported which blocks → Telecommunications Xittel Inc 247F Port-Menier —
2012-10-17 581-287 not yet reported which blocks → Telecommunications Xittel Inc 247F Pentecote —
2012-10-17 581-288 not yet reported which blocks → Telecommunications Xittel Inc 247F Natashquan —
2012-10-17 581-289 not yet reported which blocks → Telecommunications Xittel Inc 247F Mutton Bay —
2012-10-17 581-290 not yet reported which blocks → Telecommunications Xittel Inc 247F Moisie —
2012-10-17 581-291 not yet reported which blocks → Telecommunications Xittel Inc 247F La Romaine —
2012-10-17 581-292 not yet reported which blocks → Telecommunications Xittel Inc 247F Havre-Saint-Pierre —
2012-10-17 581-293 not yet reported which blocks → Telecommunications Xittel Inc 247F Harrington Harbour —
2012-10-17 706-750 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G AUGUSTA GA
2012-10-17 719-424 0–9 XXXall 10 · 7 holders which blocks → NUSO, LLC 551G COLORDOSPG CO
2012-10-17 720-588 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G DENVER CO
2012-10-17 740-781 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → HORIZON SERVICES, INC. - OH 601G CAMBRIDGE OH
2012-10-17 832-740 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G HOUSTON TX
2012-10-17 912-436 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G SAVANNAH GA
2012-10-17 937-706 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F SOCHARLETN OH
2012-10-17 937-801 0XXX1XXX6XXX8XXX · 4 holders which blocks → HORIZON SERVICES, INC. - OH 601G GEORGETOWN OH
2012-10-16 314-399 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST LOUIS MO
2012-10-16 408-797 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNJS NORTH CA
2012-10-16 541-631 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F ASHLAND OR
2012-10-16 843-620 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F HOLLYWOOD SC
2012-10-16 916-587 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C LINCOLN CA
2012-10-15 224-315 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2012-10-15 234-302 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARLBORO OH
2012-10-15 234-305 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CORTLAND OH
2012-10-15 234-314 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MANCHESTR OH
2012-10-15 234-316 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GREENSBURG OH
2012-10-15 320-401 0XXX1XXX2XXX4XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MAPLE LAKE MN
2012-10-15 440-410 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BRECKSVL OH
2012-10-15 579-881 not yet reported which blocks → Fibernetics Corporation 464D Longueuil —
2012-10-15 579-884 not yet reported which blocks → Fibernetics Corporation 464D St-Bruno —
2012-10-15 604-679 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2012-10-15 606-396 0–9 XXXall 10 · 6 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LEXINGTON 9690 MONTICELLO KY
2012-10-15 614-667 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GAHANNA OH
2012-10-15 681-209 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 MORGANTOWN WV
2012-10-15 706-470 not yet reported which blocks → TRUVISTA COMMUNICATIONS OF GEORGIA, LLC - GA 847G EASTANOLLE GA
2012-10-15 706-960 0–9 XXXall 10 · 6 holders which blocks → TRUVISTA COMMUNICATIONS OF GEORGIA, LLC - GA 847G CLAYTON GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.