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
2018-05-09 581-961 not yet reported which blocks → Distributel 083E Loretteville —
2018-05-09 581-962 not yet reported which blocks → Distributel 083E Notre-Dame-des-Laurentides —
2018-05-09 581-963 not yet reported which blocks → Distributel 083E St-Fereol —
2018-05-09 581-964 not yet reported which blocks → Distributel 083E St-Jean-ile-d'Orleans —
2018-05-09 581-965 not yet reported which blocks → Distributel 083E Ste-Petronille —
2018-05-09 581-966 not yet reported which blocks → Distributel 083E St-Tite-des-Caps —
2018-05-09 581-967 not yet reported which blocks → Distributel 083E Ste-Anne-de-Beaupre —
2018-05-09 581-968 not yet reported which blocks → Distributel 083E Ste-Brigitte-de-Laval —
2018-05-09 581-969 not yet reported which blocks → Distributel 083E Ste-Catherine —
2018-05-09 581-970 not yet reported which blocks → Distributel 083E Stoneham —
2018-05-09 581-971 not yet reported which blocks → Distributel 083E Valcartier —
2018-05-09 639-612 not yet reported which blocks → Distributel 081E Avonlea —
2018-05-09 639-614 not yet reported which blocks → Distributel 081E Balgonie —
2018-05-09 639-624 not yet reported which blocks → Distributel 081E Holdfast —
2018-05-09 646-908 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN01 NY
2018-05-09 647-359 not yet reported which blocks → Bell Mobility 6574 Toronto —
2018-05-09 647-364 not yet reported which blocks → Bell Mobility 6574 Toronto —
2018-05-09 650-407 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2018-05-09 757-973 0XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CHINCOTEGU VA
2018-05-09 825-335 not yet reported which blocks → Bell Mobility 6574 Calgary —
2018-05-09 825-512 not yet reported which blocks → TELUS 8084 Edmonton —
2018-05-09 828-600 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NC 638E LEICESTER NC
2018-05-09 828-845 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NC 638E HENDERSNVL NC
2018-05-09 828-900 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E BLACK MT NC
2018-05-09 850-809 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C VERNON FL
2018-05-09 904-587 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C ST JOHNS FL
2018-05-09 914-280 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSCHSTZN08 NY
2018-05-09 939-808 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 TRUJILLOAL PR
2018-05-09 951-451 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D HEMT SNJC CA
2018-05-09 971-299 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F GOVENTCAMP OR
2018-05-09 984-422 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E FREMONT NC
2018-05-08 226-550 not yet reported which blocks → Execulink Telecom Inc. 8226 Simcoe —
2018-05-08 228-300 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MS 719E OCEAN SPG MS
2018-05-08 236-587 not yet reported which blocks → TELUS Mobility 8301 Quesnel —
2018-05-08 249-591 not yet reported which blocks → TELUS Mobility 8303 North Bay —
2018-05-08 318-653 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F HAYNESVL LA
2018-05-08 343-548 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2018-05-08 385-955 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2018-05-08 424-412 not yet reported which blocks → SHELCOMM 0051 INGLEWOOD CA
2018-05-08 431-314 not yet reported which blocks → Fibernetics Corporation 464D Oakbank —
2018-05-08 431-315 not yet reported which blocks → Fibernetics Corporation 464D Portage La Prairie —
2018-05-08 442-289 not yet reported which blocks → SHELCOMM 0051 VICTORVL CA
2018-05-08 470-768 0–9 XXXall 10 · 5 holders which blocks → AIRESPRING, INC. 996H GAINESVL GA
2018-05-08 505-405 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NM 206F OJOCALINTE NM
2018-05-08 505-502 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → ONVOY, LLC - NM 206F CHIMAYO NM
2018-05-08 505-509 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - NM 206F DIXON NM
2018-05-08 518-806 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E MALONE NY
2018-05-08 573-910 0–9 XXXall 10 · 4 holders which blocks → AIRESPRING, INC. 996H FARMINGTON MO
2018-05-08 575-400 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F LINDRITH NM
2018-05-08 575-570 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - NM 206F CANJILON NM

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.