NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-02-08 873-732 not yet reported which blocks → Iristel Inc. 154E Lac-Megantic —
2016-02-05 343-244 not yet reported which blocks → ExaTEL Inc. 3147 Ottawa-Hull —
2016-02-05 343-303 not yet reported which blocks → Iristel Inc. 154E Jockvale —
2016-02-05 475-775 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - CT 639C MERIDEN CT
2016-02-05 506-705 not yet reported which blocks → Iristel Inc. 154E Harvey Station —
2016-02-05 562-203 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C WHITTIER CA
2016-02-05 587-207 not yet reported which blocks → Iristel Inc. 154E Hanna —
2016-02-05 587-208 not yet reported which blocks → Iristel Inc. 154E High River —
2016-02-05 587-209 not yet reported which blocks → Iristel Inc. 154E Hinton —
2016-02-05 587-870 not yet reported which blocks → Iristel Inc. 154E Jasper —
2016-02-05 616-649 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E GRAND RPDS MI
2016-02-05 639-399 not yet reported which blocks → Iristel Inc. 154E Kipling —
2016-02-05 778-608 not yet reported which blocks → Iristel Inc. 154E Hope —
2016-02-05 778-718 not yet reported which blocks → Iristel Inc. 154E Keremeos —
2016-02-05 902-914 not yet reported which blocks → Iristel Inc. 154E Inverness —
2016-02-05 902-915 not yet reported which blocks → Iristel Inc. 154E Kentville —
2016-02-05 951-404 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C TEMECULA CA
2016-02-04 205-308 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E PINSON AL
2016-02-04 226-458 not yet reported which blocks → Iristel Inc. 154E Goderich —
2016-02-04 226-602 not yet reported which blocks → Iristel Inc. 154E Essex —
2016-02-04 226-702 not yet reported which blocks → Iristel Inc. 154E Durham —
2016-02-04 249-200 not yet reported which blocks → Iristel Inc. 154E Espanola —
2016-02-04 306-900 not yet reported which blocks → Iristel Inc. 154E Fort Qu'Appelle —
2016-02-04 321-522 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C COCOA FL
2016-02-04 346-223 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J HOUSTON TX
2016-02-04 346-226 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J HOUSTON TX
2016-02-04 346-227 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J HOUSTON TX
2016-02-04 365-651 not yet reported which blocks → Iristel Inc. 154E Dunnville —
2016-02-04 365-801 not yet reported which blocks → Iristel Inc. 154E Fort Erie —
2016-02-04 458-292 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E BEND OR
2016-02-04 506-703 not yet reported which blocks → Iristel Inc. 154E Florenceville —
2016-02-04 506-704 not yet reported which blocks → Iristel Inc. 154E Grand Falls —
2016-02-04 506-706 not yet reported which blocks → Iristel Inc. 154E Dalhousie —
2016-02-04 506-906 not yet reported which blocks → Iristel Inc. 154E Doaktown —
2016-02-04 510-369 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C RICHMOND CA
2016-02-04 561-332 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DELRAY BCH FL
2016-02-04 587-419 not yet reported which blocks → Iristel Inc. 154E Drumheller —
2016-02-04 587-809 not yet reported which blocks → Iristel Inc. 154E Fox Creek —
2016-02-04 587-812 not yet reported which blocks → Iristel Inc. 154E Grande Cache —
2016-02-04 605-931 1XXX2XXX3XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2016-02-04 628-236 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 NOVATO CA
2016-02-04 639-390 not yet reported which blocks → Iristel Inc. 154E Davidson —
2016-02-04 763-453 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 TWINCITIES MN
2016-02-04 778-901 not yet reported which blocks → Iristel Inc. 154E Grand Forks —
2016-02-04 778-902 not yet reported which blocks → Iristel Inc. 154E Gulf Islands —
2016-02-04 782-820 not yet reported which blocks → Iristel Inc. 154E Digby —
2016-02-04 805-257 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - CA 649C PASOROBLES CA
2016-02-04 807-790 not yet reported which blocks → Iristel Inc. 154E Geraldton —
2016-02-04 873-371 not yet reported which blocks → Iristel Inc. 154E Deauville —
2016-02-04 971-286 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 WARRENTON OR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.