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
2020-06-11 365-307 not yet reported which blocks → Fibernetics Corporation 464D Snelgrove —
2020-06-11 365-308 not yet reported which blocks → Fibernetics Corporation 464D Caledonia —
2020-06-11 365-309 not yet reported which blocks → Fibernetics Corporation 464D Grimsby —
2020-06-11 413-380 0XXX3XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RICHMOND MA
2020-06-11 417-513 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 NEOSHO MO
2020-06-11 430-279 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H GORDONVL TX
2020-06-11 469-841 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2020-06-11 475-445 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C NEWTOWN CT
2020-06-11 475-501 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C GEORGETOWN CT
2020-06-11 540-694 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 STEPHENSCY VA
2020-06-11 548-248 not yet reported which blocks → Fibernetics Corporation 464D Goderich —
2020-06-11 609-881 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NJ 637C DENNISVL NJ
2020-06-11 657-440 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ANAHEIM CA
2020-06-11 659-234 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CHELSEA AL
2020-06-11 681-268 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 HNTNGTNZN1 WV
2020-06-11 762-529 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H AUGUSTA GA
2020-06-11 810-295 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BRIGHTON MI
2020-06-11 854-348 6XXX which blocks → FRACTEL, LLC 965H CROSS SC
2020-06-11 858-301 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D EL CAJON CA
2020-06-11 938-465 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CHILDERSBG AL
2020-06-11 951-535 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D MURRIETA CA
2020-06-11 973-381 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NJ 637C NUTLEY NJ
2020-06-10 208-593 0–9 XXXall 10 · 5 holders which blocks → HD CARRIER LLC 321J BOISE ID
2020-06-10 254-425 0XXX2XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - TX 903C POTTSVILLE TX
2020-06-10 254-524 0XXX2XXX4XXX5XXX9XXX · 2 holders which blocks → ONVOY, LLC - TX 903C FLAT TX
2020-06-10 307-900 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H GLENDO WY
2020-06-10 332-234 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J NWYRCYZN01 NY
2020-06-10 434-474 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - VA 138E HAMPDESDNY VA
2020-06-10 571-701 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - VA 138E NOKESVILLE VA
2020-06-10 571-901 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E ENGLESIDE VA
2020-06-10 606-430 0–9 XXXwhole prefix which blocks → INTER MOUNTAIN CABLE DBA MIKROTEC COMMUNICATIONS 2623 PIKEVILLE KY
2020-06-10 737-268 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2020-06-10 804-808 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - VA 138E FARNHAM VA
2020-06-10 839-356 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ORANGEBURG SC
2020-06-10 845-509 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WALDEN NY
2020-06-10 845-991 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC- NY 384C BEACON NY
2020-06-10 848-289 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NJ 637C SOUTHRIVER NJ
2020-06-10 848-801 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NJ 637C DUNELLEN NJ
2020-06-10 848-909 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NJ 637C LAKEHURST NJ
2020-06-10 848-986 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NJ 637C TOMS RIVER NJ
2020-06-10 848-997 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NJ 637C FREEHOLD NJ
2020-06-10 862-802 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NJ 637C ROCKAWAY NJ
2020-06-10 862-901 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NJ 637C MILLBURN NJ
2020-06-10 912-465 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SAVANNAH GA
2020-06-09 225-569 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TUNICA LA
2020-06-09 240-301 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - MD 876D CLEAR SPG MD
2020-06-09 269-261 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BATTLE CRK MI
2020-06-09 314-916 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J ST LOUIS MO
2020-06-09 343-643 not yet reported which blocks → Fibernetics Corporation 464D Brockville —
2020-06-09 351-216 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAMILTON MA

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.