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
2018-02-07 236-332 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Aldergrove —
2018-02-07 236-632 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Aldergrove —
2018-02-07 346-295 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C ARCOLA TX
2018-02-07 365-336 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hamilton —
2018-02-07 365-366 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hamilton —
2018-02-07 469-436 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C DALLAS TX
2018-02-07 563-292 0–9 XXXall 10 · 5 holders which blocks → AIRUS, INC - IA 423H WEST UNION IA
2018-02-07 563-334 0–9 XXXall 10 · 6 holders which blocks → AIRUS, INC - IA 423H DECORAH IA
2018-02-07 669-313 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 CAMPBELL CA
2018-02-07 682-341 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - TX 903C MANSFIELD TX
2018-02-07 806-601 0–9 XXXall 10 · 7 holders which blocks → VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 1163 TAHOKA TX
2018-02-07 830-415 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C EAGLE PASS TX
2018-02-07 873-566 not yet reported which blocks → Videotron Ltd. 8306 Bouchette —
2018-02-07 873-567 not yet reported which blocks → Videotron Ltd. 8306 Wakefield —
2018-02-07 978-896 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PEABODY MA
2018-02-06 236-476 not yet reported which blocks → TELUS 8086 Vancouver —
2018-02-06 249-213 not yet reported which blocks → TELUS Integrated Communications 2782 McKellar —
2018-02-06 307-204 0–9 XXXall 10 · 2 holders which blocks → AIRUS, INC. - WY 581H CODY WY
2018-02-06 346-326 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2018-02-06 365-243 not yet reported which blocks → TELUS Integrated Communications 2782 Garden Hill —
2018-02-06 423-524 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G JOHNSON CY TN
2018-02-06 516-517 0–9 XXXall 10 · 5 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN06 NY
2018-02-06 548-229 not yet reported which blocks → TELUS Integrated Communications 2782 Watford —
2018-02-06 548-230 not yet reported which blocks → TELUS Integrated Communications 2782 Pelee Island —
2018-02-06 548-231 not yet reported which blocks → TELUS Integrated Communications 2782 Norwich —
2018-02-06 571-417 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEESBURG VA
2018-02-06 647-731 not yet reported which blocks → Bell Mobility 6574 Toronto —
2018-02-06 650-505 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2018-02-06 681-621 1XXX8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 BLUEFIELD WV
2018-02-06 737-237 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C AUSTIN TX
2018-02-06 825-222 not yet reported which blocks → TELUS 8084 Calgary —
2018-02-05 314-257 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 ST LOUIS MO
2018-02-05 346-306 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C LANGHAMCRK TX
2018-02-05 413-319 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MA 892D HOLYOKE MA
2018-02-05 431-338 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2018-02-05 478-209 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → PINELAND COMMUNICATIONS, INC. - GA 458G SANDERSVL GA
2018-02-05 647-306 not yet reported which blocks → Bell Mobility 6574 Toronto —
2018-02-05 774-358 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MA 892D HARWICH MA
2018-02-05 803-205 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D COLUMBIA SC
2018-02-05 807-827 not yet reported which blocks → ExaTEL Inc. 3147 Manitouwadge —
2018-02-05 864-203 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D GREENVILLE SC
2018-02-05 873-222 not yet reported which blocks → Distributel 083E Radisson —
2018-02-05 873-223 not yet reported which blocks → Distributel 083E Wemindji —
2018-02-05 978-307 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MA 892D HAMILTON MA
2018-02-02 385-260 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2018-02-02 502-260 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 LA GRANGE KY
2018-02-02 513-499 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HAMILTON OH
2018-02-02 910-746 0–9 XXXall 10 · 4 holders which blocks → SOUTH CAROLINA NET, INC. - NC 511C WILMINGTON NC
2018-02-01 208-202 0–9 XXXall 10 · 7 holders which blocks → NUSO, LLC 551G BOISE ID
2018-02-01 240-588 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GRANTSVL MD

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.