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
2016-02-29 315-740 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C MASSENA NY
2016-02-29 424-377 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C AVALON CA
2016-02-29 507-614 7XXX which blocks → RS FIBER COOPERATIVE - MN 754H WINTHROP MN
2016-02-29 615-857 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TN 525E CHARLOTTE TN
2016-02-29 616-747 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLCV - MI 543C ROCKFORD MI
2016-02-29 628-899 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC MT-EV CA
2016-02-29 708-419 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC 224C CALUMET CY IL
2016-02-29 716-340 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E LITTLE VLY NY
2016-02-29 716-377 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 TONAWANDA NY
2016-02-29 731-747 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TN 525E HUMBOLDT TN
2016-02-29 757-520 0–9 XXXwhole prefix which blocks → ONVOY, LLC - VA 138E NRFOLKZON1 VA
2016-02-29 845-599 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E GRAHAMSVL NY
2016-02-29 864-479 0–9 XXXall 10 · 8 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K GREER SC
2016-02-29 908-424 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PLAINFIELD NJ
2016-02-29 928-663 0XXX1XXX8XXX9XXX · 3 holders which blocks → WAVENATION, LLC 700J CHINLE AZ
2016-02-29 980-240 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 CHARLOTTE NC
2016-02-26 226-805 not yet reported which blocks → Iristel Inc. 154E Windsor —
2016-02-26 249-701 not yet reported which blocks → Iristel Inc. 154E Parry Sound —
2016-02-26 254-271 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - TX 903C EASTLAND TX
2016-02-26 361-977 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - TX 903C PORTLDGGRY TX
2016-02-26 442-301 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - CA 649C JUNE LAKE CA
2016-02-26 513-466 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OH 464C MASON OH
2016-02-26 562-210 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NORWALK CA
2016-02-26 586-240 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-02-26 586-396 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-02-26 586-483 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-02-26 586-527 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-02-26 586-550 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WARREN MI
2016-02-26 586-559 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WARREN MI
2016-02-26 586-628 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WARREN MI
2016-02-26 586-676 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-02-26 586-695 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MT CLEMENS MI
2016-02-26 586-922 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WARREN MI
2016-02-26 603-901 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 7778 CONWAY NH
2016-02-26 609-201 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NJ 637C ALLENTOWN NJ
2016-02-26 614-587 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX which blocks → ONVOY, LLC - OH 464C CANALWHSTR OH
2016-02-26 629-205 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TN 525E FAIRVIEW TN
2016-02-26 657-302 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2016-02-26 671-683 not yet reported which blocks → GUAM WIRELESS TELEPHONE COMPANY, LLC 3945 AGANA GU
2016-02-26 747-206 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NORTHRIDGE CA
2016-02-26 774-556 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 MARLBORO MA
2016-02-26 774-778 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → METROPCS, INC. 5562 WORCESTER MA
2016-02-26 803-859 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - SC 548E GRANITEVL SC
2016-02-26 857-280 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MA 892D BRIGHTON MA
2016-02-26 858-276 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2016-02-26 902-901 not yet reported which blocks → Iristel Inc. 154E Windsor —
2016-02-26 978-350 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MA 892D TEMPLETON MA
2016-02-25 231-707 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C NEWAYGO MI
2016-02-25 321-830 0–9 XXXall 10 · 3 holders which blocks → SMART CITY SOLUTIONS II, LLC DBA SMART CITY METRO 8105 COCOA FL
2016-02-25 321-831 0–9 XXXall 10 · 3 holders which blocks → SMART CITY SOLUTIONS II, LLC DBA SMART CITY METRO 8105 MELBOURNE FL

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.