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
2018-02-01 260-258 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
2018-01-30 639-318 not yet reported which blocks → Bell Mobility 6574 Saskatoon —
2018-01-30 782-467 not yet reported which blocks → Bragg Communications Inc. 4878 Cheticamp —
2018-01-30 782-468 not yet reported which blocks → Bragg Communications Inc. 4878 Ingonish —
2018-01-30 782-470 not yet reported which blocks → Bragg Communications Inc. 4878 St. Ann's Bay —
2018-01-30 782-471 not yet reported which blocks → Bragg Communications Inc. 4878 Margaree —
2018-01-30 782-473 not yet reported which blocks → Bragg Communications Inc. 4878 Neil's Harbour —
2018-01-30 782-475 not yet reported which blocks → Bragg Communications Inc. 4878 Gabarus —
2018-01-30 782-484 not yet reported which blocks → Bragg Communications Inc. 4878 Dingwall —
2018-01-30 782-485 not yet reported which blocks → Bragg Communications Inc. 4878 Margaree Forks —
2018-01-30 971-324 0XXX2XXX5XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K NEHALEM OR
2018-01-29 628-260 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNFC CNTRL CA
2018-01-29 747-270 0–9 XXXall 10 · 8 holders which blocks → BLUIP, INC. 819H GLENDALE CA
2018-01-29 929-467 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NWYRCYZN10 NY
2018-01-29 929-472 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 NWYRCYZN11 NY
2018-01-26 220-202 0XXX2XXX5XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TILTONSVL OH
2018-01-26 325-238 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C ABILENE TX
2018-01-26 407-638 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 SANFORD FL
2018-01-26 407-639 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2018-01-26 424-419 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 INGLEWOOD CA
2018-01-26 442-484 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 INDIO CA
2018-01-26 540-549 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MILL GAP VA
2018-01-26 540-601 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BLUE GRASS VA
2018-01-26 540-648 2XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MONTEREY VA
2018-01-26 551-219 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 HACKENSACK NJ
2018-01-26 607-715 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 6 holders which blocks → DTC CABLE, INC. - NY 084J HOBART NY
2018-01-26 843-919 0–9 XXXall 10 · 3 holders which blocks → SOUTH CAROLINA NET, INC. - SC 1784 TIMMONSVL SC
2018-01-26 850-750 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C MILTON FL
2018-01-26 850-988 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C CANTONMENT FL

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.