NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

375 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 28
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
2018-02-06 548-229 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
2018-02-01 260-258 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G FORT WAYNE IN
2018-02-01 431-849 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2018-02-01 581-453 not yet reported which blocks → Bell Mobility 6574 Havre-Aubert —
2018-02-01 587-915 not yet reported which blocks → Bell Mobility 6574 Calgary —
2018-02-01 647-305 not yet reported which blocks → Bell Mobility 6574 Toronto —
2018-02-01 712-206 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 ARMSTRONG IA
2018-02-01 806-325 6XXX7XXX9XXX · 3 holders which blocks → VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 1163 MORTON TX
2018-02-01 843-809 0–9 XXXall 10 · 6 holders which blocks → SOUTH CAROLINA NET, INC. - SC 1784 MONCKS COR SC
2018-02-01 843-927 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → SOUTH CAROLINA NET, INC. - SC 1784 CHESTERFLD SC
2018-02-01 870-369 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 WILMOT AR
2018-02-01 936-282 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2018-01-31 224-283 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2018-01-31 224-284 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 DEERFIELD IL
2018-01-31 256-681 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MORGANCITY AL
2018-01-31 256-752 0XXX1XXX3XXX6XXX7XXX9XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K UNIONGROVE AL
2018-01-31 336-304 0XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BOOMER NC
2018-01-31 336-400 0XXX3XXX4XXX6XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CHAMPION NC
2018-01-31 336-563 0XXX3XXX8XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CLINGMAN NC
2018-01-31 515-579 2XXX5XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 SLATER IA
2018-01-31 712-280 0XXX1XXX2XXX7XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 HARLAN IA
2018-01-31 843-739 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTH CAROLINA NET, INC. - SC 1784 NWALTERBOR SC
2018-01-30 215-201 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHLDLPHZN1 PA

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.