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
2020-05-08 351-900 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H IPSWICH MA
2020-05-08 571-998 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - VA 138E INDENDNTHL VA
2020-05-08 602-693 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J PHOENIX AZ
2020-05-08 707-831 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CLERLAOAKS CA
2020-05-08 737-825 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AUSTIN TX
2020-05-08 757-780 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E CHUCKATUCK VA
2020-05-08 757-799 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E NRFOLKZON3 VA
2020-05-08 857-465 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BOSTON MA
2020-05-07 272-242 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 JERMYN PA
2020-05-07 307-770 0XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ALL WEST/WYOMING, INC. 3880 FARSON WY
2020-05-07 437-444 not yet reported which blocks → IXICA Communications Inc. 812H Toronto —
2020-05-07 437-666 not yet reported which blocks → IXICA Communications Inc. 812H Toronto —
2020-05-07 484-750 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ALLENTOWN PA
2020-05-07 520-523 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AZ 630E SIERRAVIST AZ
2020-05-07 520-525 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AZ 630E BISBEE AZ
2020-05-07 602-671 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PHOENIX AZ
2020-05-07 725-373 0–9 XXXall 10 · 9 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAS VEGAS NV
2020-05-07 757-997 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - VA 138E WINDSOR VA
2020-05-07 848-288 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NJ 637C BELMAR NJ
2020-05-07 854-345 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BLUFFTON SC
2020-05-07 854-465 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H TIMMONSVL SC
2020-05-07 854-946 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H LOWCOUNTRY SC
2020-05-07 864-786 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H WILLIAMSTN SC
2020-05-07 864-842 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H WESTMINSTR SC
2020-05-06 213-524 0–9 XXXall 10 · 4 holders which blocks → AIRESPRING, INC. 996H LSAN DA 01 CA
2020-05-06 219-529 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HAMMOND IN
2020-05-06 219-946 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LAKE STA IN
2020-05-06 224-332 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 LAKEFOREST IL
2020-05-06 308-302 0XXX1XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 TRYON NE
2020-05-06 309-614 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SMITHFIELD IL
2020-05-06 469-823 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCKINNEY TX
2020-05-06 765-842 1XXX2XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CAYUGA IN
2020-05-06 804-587 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 CALLAO VA
2020-05-06 870-649 0XXX2XXX · 2 holders which blocks → E. RITTER COMMS DBA RITTER COMMUNICATIONS, INC. AR 095A STUTTGART AR
2020-05-06 931-531 1XXX2XXX5XXX6XXX7XXX8XXX which blocks → ONVOY, LLC - TN 525E WAYNESBORO TN
2020-05-05 548-994 not yet reported which blocks → TELUS Mobility 8303 Kitchener-Waterloo —
2020-05-05 561-481 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2020-05-05 618-415 0XXX1XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E BEECHER CY IL
2020-05-05 618-502 0XXX1XXX2XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E FIELDON IL
2020-05-05 618-506 0XXX1XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E HETTICK IL
2020-05-05 618-552 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E SANDOVAL IL
2020-05-05 667-280 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VONAGE AMERICA LLC 197D ELLICOTTCY MD
2020-05-05 782-582 not yet reported which blocks → Fibernetics Corporation 464D Truro —
2020-05-05 782-583 not yet reported which blocks → Fibernetics Corporation 464D Kentville —
2020-05-05 782-584 not yet reported which blocks → Fibernetics Corporation 464D Bridgewater —
2020-05-05 782-585 not yet reported which blocks → Fibernetics Corporation 464D Amherst —
2020-05-05 862-356 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BUTLER NJ
2020-05-05 908-529 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H BERNARDSVL NJ
2020-05-04 206-990 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2020-05-04 229-427 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VALDOSTA GA

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.