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
2020-06-04 940-358 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → CSC WIRELESS, LLC 425J WICHITAFLS TX
2020-06-04 956-654 2XXX3XXX6XXX7XXX · 3 holders which blocks → CSC WIRELESS, LLC 425J HARLINGEN TX
2020-06-03 228-269 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J BILOXI MS
2020-06-03 251-326 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 MOBILE AL
2020-06-03 475-272 0–9 XXXall 10 · 5 holders which blocks → CABLEVISION LIGHTPATH, INC. - CT 4950 FAIRFIELD CT
2020-06-03 505-622 1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H PECOS NM
2020-06-03 505-677 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ALBUQURQUE NM
2020-06-03 505-758 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H PINE HILL NM
2020-06-03 531-245 0XXX2XXX3XXX4XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HARVARD NE
2020-06-03 575-766 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H EUNICE NM
2020-06-03 661-788 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H BKFD SOUTH CA
2020-06-03 786-386 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C NORTH DADE FL
2020-06-03 902-355 not yet reported which blocks → IXICA Communications Inc. 812H Bridgewater —
2020-06-03 902-505 not yet reported which blocks → IXICA Communications Inc. 812H Truro —
2020-06-03 902-508 not yet reported which blocks → IXICA Communications Inc. 812H Wolfville —
2020-06-03 902-509 not yet reported which blocks → IXICA Communications Inc. 812H Windsor —
2020-06-03 902-516 not yet reported which blocks → IXICA Communications Inc. 812H Amherst —
2020-06-03 904-664 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C JACKSONVL FL
2020-06-03 980-880 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J CHARLOTTE NC
2020-06-02 209-501 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MODESTO CA
2020-06-02 225-441 0–9 XXXall 10 · 2 holders which blocks → CSC WIRELESS, LLC 425J BATONROUGE LA
2020-06-02 334-955 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HOLTVILLE AL
2020-06-02 470-607 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J ATLANTA GA
2020-06-02 504-386 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J NEWORLEANS LA
2020-06-02 505-408 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2020-06-02 505-533 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ABIQUIU NM
2020-06-02 505-932 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FARMINGTON NM
2020-06-02 513-643 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - OH 464C WILLIAMSBG OH
2020-06-02 513-647 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C MIDDLETOWN OH
2020-06-02 520-502 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E SASABE AZ
2020-06-02 520-522 2XXX5XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H CASABLANCA AZ
2020-06-02 520-655 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H SUPERIOR AZ
2020-06-02 567-313 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C CARDINGTON OH
2020-06-02 575-333 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H LOVINGTON NM
2020-06-02 607-350 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C DAVENPORT NY
2020-06-02 657-438 0–9 XXXall 10 · 4 holders which blocks → AIRESPRING, INC. 996H ORANGE CA
2020-06-02 734-519 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E ANN ARBOR MI
2020-06-02 763-332 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TWINCITIES MN
2020-06-02 928-544 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H CASTLEROCK AZ
2020-06-02 928-842 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PARKER AZ
2020-06-02 928-877 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H PARKER DAM AZ
2020-06-02 928-918 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AZ 630E HARQUHLVLY AZ
2020-06-02 928-938 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AZ 630E HYDER AZ
2020-06-02 928-977 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H YUMA AZ
2020-06-02 949-592 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CAPITRNVLY CA
2020-06-02 951-528 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D TEMECULA CA
2020-06-01 213-522 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LSAN DA 01 CA
2020-06-01 213-567 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LSAN DA 02 CA
2020-06-01 213-667 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LSAN DA 03 CA
2020-06-01 213-733 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LSAN DA 14 CA

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.