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
2018-12-31 231-261 0–9 XXXall 10 · 2 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F LUDINGTON MI
2018-12-31 385-287 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9636 LEHI UT
2018-12-31 386-247 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 LAKE CITY FL
2018-12-31 470-436 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2018-12-31 774-380 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BRIDGEWTR MA
2018-12-31 781-755 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WALTHAM MA
2018-12-31 812-818 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 MADISON IN
2018-12-31 848-273 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 MIDDLETOWN NJ
2018-12-31 947-520 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ROYAL OAK MI
2018-12-31 947-523 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ROYAL OAK MI
2018-12-31 989-880 0XXX2XXX3XXX7XXX9XXX · 4 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F ALPENA MI
2018-12-28 564-888 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J VANCOUVER WA
2018-12-28 763-297 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 CAMBRIDGE MN
2018-12-28 956-450 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 EDINBURG TX
2018-12-27 515-452 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J DES MOINES IA
2018-12-27 626-499 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 AZUSA CA
2018-12-27 712-321 0–9 XXXall 10 · 6 holders which blocks → C-M-L TELEPHONE COOPERATIVE ASSOCIATION OF MERIDEN 366J CHEROKEE IA
2018-12-27 727-292 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 STPETERSBG FL
2018-12-26 681-259 0XXX1XXX2XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F HARMAN WV
2018-12-26 681-263 0XXX1XXX2XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F LEVELS WV
2018-12-26 681-277 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - WV 449F HUNDRED WV
2018-12-26 681-345 0XXX1XXX3XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F SARDIS WV
2018-12-26 681-384 3XXX4XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F MT MORRIS WV
2018-12-26 681-395 0XXX1XXX3XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F JOETOWN WV
2018-12-26 681-403 2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → ONVOY, LLC - WV 449F PINE GROVE WV
2018-12-26 681-405 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F W MILFORD WV
2018-12-26 681-414 1XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → ONVOY, LLC - WV 449F READER WV
2018-12-26 681-419 0XXX1XXX4XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F MAYSVILLE WV
2018-12-26 681-444 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - WV 449F PAW PAW WV
2018-12-26 681-481 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F CANAAN VLY WV
2018-12-26 681-550 0XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F WALKERSVL WV
2018-12-26 681-589 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WV 449F ROMNEY WV
2018-12-26 681-619 0XXX1XXX2XXX3XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - WV 449F WADESTOWN WV
2018-12-26 681-680 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F EGLON WV
2018-12-26 681-717 1XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F WARDENSVL WV
2018-12-26 681-722 0XXX1XXX2XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - WV 449F SMITHFIELD WV
2018-12-26 681-800 0XXX1XXX2XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F HACKER VLY WV
2018-12-26 681-816 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WV 449F AUGUSTA WV
2018-12-26 681-839 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WV 449F FAIRMONT WV
2018-12-26 681-949 0XXX1XXX4XXX6XXX9XXX · 3 holders which blocks → ONVOY, LLC - WV 449F WALLACE WV
2018-12-24 364-999 0–9 XXXall 10 · 3 holders which blocks → TERRA NOVA TELECOM INC. 145J JORDAN KY
2018-12-24 470-521 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2018-12-24 475-216 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2018-12-24 475-256 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2018-12-24 585-504 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2018-12-24 620-999 0XXX1XXX7XXX9XXX · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J ALTOONA KS
2018-12-24 636-666 0–9 XXXall 10 · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J UNION MO
2018-12-24 640-888 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J ATLNTIC CY NJ
2018-12-24 707-740 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EUREKA CA
2018-12-24 720-661 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO

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.