NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2021-01-13 251-397 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AL 604E DAUPHIN IS AL
2021-01-13 256-967 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E TOWN CREEK AL
2021-01-13 334-848 0XXX1XXX2XXX4XXX8XXX · 4 holders which blocks → ONVOY, LLC - AL 604E ORRVILLE AL
2021-01-13 334-928 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E THOMASVL AL
2021-01-13 341-234 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H OKLD ALMD CA
2021-01-13 385-395 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-01-13 409-946 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H PT BOLIVAR TX
2021-01-13 501-449 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CABOT AR
2021-01-13 502-674 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - KY 987E LEBANONJCT KY
2021-01-13 571-588 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2021-01-13 669-307 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNJS NORTH CA
2021-01-13 726-336 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SANANTONIO TX
2021-01-13 820-356 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H POINT MUGU CA
2021-01-13 820-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SANTAMARIA CA
2021-01-13 858-588 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H RNCHOBRNDO CA
2021-01-13 864-695 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA SC- LLC 635C GREENVILLE SC
2021-01-13 908-919 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - NJ 637C CLINTON NJ
2021-01-13 936-667 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H NORMANGEE TX
2021-01-13 936-786 6XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H EVERGREEN TX
2021-01-12 226-725 not yet reported which blocks → Fibernetics Corporation 464D Brantford —
2021-01-12 226-768 not yet reported which blocks → Fibernetics Corporation 464D Chatham —
2021-01-12 229-606 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - GA 067D FUNSTON GA
2021-01-12 229-626 0XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → ONVOY, LLC - GA 067D JAKIN GA
2021-01-12 240-749 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2021-01-12 256-897 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E COURTLAND AL
2021-01-12 256-957 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E DECATUR AL
2021-01-12 262-283 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 WAUKESHA WI
2021-01-12 313-489 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2021-01-12 313-597 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2021-01-12 334-772 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F NOTASULGA AL
2021-01-12 346-789 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H CHANNELVW TX
2021-01-12 385-364 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E OGDEN UT
2021-01-12 385-379 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
2021-01-12 385-402 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E BOUNTIFUL UT
2021-01-12 385-483 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E PROVO UT
2021-01-12 430-314 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H GILMER TX
2021-01-12 430-460 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → ONVOY, LLC - TX 903C OVERTON TX
2021-01-12 430-699 1XXX6XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H DRY CREEK TX
2021-01-12 435-274 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - UT 871E TOOELE UT
2021-01-12 470-743 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E GRIFFIN GA
2021-01-12 564-208 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
2021-01-12 579-464 not yet reported which blocks → Fibernetics Corporation 464D St-Calixte-de-Kilkenny —
2021-01-12 579-465 not yet reported which blocks → Fibernetics Corporation 464D St-Hippolyte —
2021-01-12 579-466 not yet reported which blocks → Fibernetics Corporation 464D St-Lin —
2021-01-12 580-944 0XXX1XXX4XXX · 3 holders which blocks → WICHITA ONLINE, INC. - OK 258F GOTEBO OK
2021-01-12 614-780 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 DUBLIN OH
2021-01-12 620-484 0XXX1XXX4XXX5XXX · 3 holders which blocks → ONVOY, LLC - KS 205F BUHLER KS
2021-01-12 620-494 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - KS 205F BURNS KS
2021-01-12 701-612 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → COMPUTER TELEPHONY INNOVATIONS INC. DBA VOXTELESYS 597J FARGO ND
2021-01-12 725-577 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H LAS VEGAS NV

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.