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
2018-07-18 438-856 not yet reported which blocks → Bell Mobility 6574 Montreal —
2018-07-18 980-281 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E LINCOLNTON NC
2018-07-17 234-247 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F SALEM OH
2018-07-17 236-298 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2018-07-17 346-349 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CHANNELVW TX
2018-07-17 438-854 not yet reported which blocks → Bell Mobility 6574 Montreal —
2018-07-17 469-493 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2018-07-17 470-460 0–9 XXXall 10 · 4 holders which blocks → WIDE VOICE, LLC - GA 529H ATLANTA SO GA
2018-07-17 564-240 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9638 SILVERDALE WA
2018-07-17 581-796 not yet reported which blocks → Iristel Inc. 154E Natashquan —
2018-07-17 581-809 not yet reported which blocks → Iristel Inc. 154E Port-Cartier —
2018-07-17 647-319 not yet reported which blocks → Bell Mobility 6574 Toronto —
2018-07-17 647-320 not yet reported which blocks → Bell Mobility 6574 Toronto —
2018-07-17 661-501 0–9 XXXall 10 · 7 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L BKFD SOUTH CA
2018-07-17 785-509 0XXX2XXX3XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → ONVOY, LLC - KS 205F ESKRIDGE KS
2018-07-17 785-599 0XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - KS 205F MELVERN KS
2018-07-17 785-710 0XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - KS 205F HARVEYVL KS
2018-07-17 785-782 0XXX3XXX4XXX7XXX · 2 holders which blocks → ONVOY, LLC - KS 205F QUENEMO KS
2018-07-17 785-971 0XXX1XXX2XXX3XXX5XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - KS 205F ALMA KS
2018-07-17 989-998 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OWOSSO MI
2018-07-16 223-205 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MARION PA
2018-07-16 236-299 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2018-07-16 236-357 not yet reported which blocks → Shaw Telecom Inc. 497E Bowen Island —
2018-07-16 513-953 0–9 XXXall 10 · 4 holders which blocks → WIDE VOICE, LLC - OH 765H HAMILTON OH
2018-07-16 587-932 not yet reported which blocks → Bell Mobility 6574 Calgary —
2018-07-16 681-682 0–9 XXXall 10 · 7 holders which blocks → WIDE VOICE, LLC - WV 729H MADISON WV
2018-07-13 267-764 0–9 XXXall 10 · 5 holders which blocks → ADVANCED TELECOM SOLUTIONS, LLC 181J PHLDLPHZN1 PA
2018-07-13 314-370 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CREVECOEUR MO
2018-07-13 581-480 not yet reported which blocks → Iristel Inc. 154E Sainte-Anne-des-Monts —
2018-07-13 581-517 not yet reported which blocks → Iristel Inc. 154E Baie-Trinite —
2018-07-13 581-518 not yet reported which blocks → Iristel Inc. 154E Amqui —
2018-07-13 581-519 not yet reported which blocks → Iristel Inc. 154E Mont-Louis —
2018-07-13 581-797 not yet reported which blocks → Iristel Inc. 154E Havre-Saint-Pierre —
2018-07-13 581-798 not yet reported which blocks → Iristel Inc. 154E Mont-Joli —
2018-07-13 581-799 not yet reported which blocks → Iristel Inc. 154E Saint-Fabien —
2018-07-13 616-256 0–9 XXXall 10 · 6 holders which blocks → TELNET WORLDWIDE, INC. 817J GRAND RPDS MI
2018-07-13 734-371 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 DUNDEE MI
2018-07-13 734-410 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 MONROE MI
2018-07-13 786-980 0–9 XXXall 10 · 5 holders which blocks → INVOXIO INCORPORATED 158H PERRINE FL
2018-07-13 857-347 0–9 XXXall 10 · 5 holders which blocks → ADVANCED TELECOM SOLUTIONS, LLC 181J BOSTON MA
2018-07-13 914-306 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 WSCHSTZN08 NY
2018-07-12 312-872 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN01 IL
2018-07-12 351-208 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 LOWELL MA
2018-07-12 417-406 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 BOLIVAR MO
2018-07-12 440-613 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VICTORY OH
2018-07-12 581-515 not yet reported which blocks → Iristel Inc. 154E Port-Daniel —
2018-07-12 581-516 not yet reported which blocks → Iristel Inc. 154E Forestville —
2018-07-12 581-877 not yet reported which blocks → Iristel Inc. 154E Grande-Vallee —
2018-07-12 581-878 not yet reported which blocks → Iristel Inc. 154E Perce —
2018-07-12 581-879 not yet reported which blocks → Iristel Inc. 154E Chandler —

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.