NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-07-25 437-525 not yet reported which blocks → Iristel Inc. 154E Toronto —
2023-07-25 437-526 not yet reported which blocks → Iristel Inc. 154E Toronto —
2023-07-25 437-527 not yet reported which blocks → Iristel Inc. 154E Toronto —
2023-07-25 437-528 not yet reported which blocks → Iristel Inc. 154E Toronto —
2023-07-25 437-529 not yet reported which blocks → Iristel Inc. 154E Toronto —
2023-07-25 472-223 0–9 XXXall 10 · 3 holders which blocks → AT&T - LOCAL 7421 ROCKINGHAM NC
2023-07-25 534-218 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RICE LAKE WI
2023-07-25 571-650 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E ARCOLA VA
2023-07-25 571-652 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - VA 138E WSNGTNZN08 VA
2023-07-25 571-653 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - VA 138E WSNGTNZN19 VA
2023-07-25 612-496 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWINCITIES MN
2023-07-25 657-672 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-07-25 657-673 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2023-07-25 657-674 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2023-07-25 661-784 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-07-25 667-440 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MD 876D BALTIMORE MD
2023-07-25 803-706 0XXX1XXX6XXX9XXX · 3 holders which blocks → AT&T - LOCAL 7421 EASTOVER SC
2023-07-25 812-317 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - IN 097D GRAYSVILLE IN
2023-07-25 904-927 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C JACKSONVL FL
2023-07-25 971-454 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVERTON OR
2023-07-25 984-336 0–9 XXXall 10 · 3 holders which blocks → AT&T - LOCAL 7421 CHAPELHILL NC
2023-07-25 984-337 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NC 638E MOUNTOLIVE NC
2023-07-25 984-338 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NC 638E RALEIGH NC
2023-07-24 367-403 not yet reported which blocks → Iristel Inc. 154E Quebec —
2023-07-24 507-949 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANKATO MN
2023-07-21 716-723 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMESTOWN NY
2023-07-21 716-724 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 JAMESTOWN NY
2023-07-21 803-301 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BARNWELL SC
2023-07-21 816-594 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KANSASCITY MO
2023-07-21 854-249 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HILTONHEAD SC
2023-07-20 215-835 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MORRISVL PA
2023-07-20 283-204 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - OH 464C MORNINGSUN OH
2023-07-20 283-205 2XXX4XXX · 2 holders which blocks → ONVOY, LLC - OH 464C SO LEBANON OH
2023-07-20 283-206 0XXX1XXX2XXX6XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C WILLIAMSBG OH
2023-07-20 283-207 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C SHANDON OH
2023-07-20 283-208 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C HARRISON OH
2023-07-20 316-230 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WICHITA KS
2023-07-20 334-893 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONTGOMERY AL
2023-07-20 337-575 0XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VINTON LA
2023-07-20 437-658 not yet reported which blocks → Bell Mobility 6574 Toronto —
2023-07-20 579-257 not yet reported which blocks → Bell Canada 984C St-Ours —
2023-07-20 579-398 not yet reported which blocks → Cooptel 818D Lanoraie —
2023-07-20 579-482 not yet reported which blocks → Cooptel 818D St-Barthelemy —
2023-07-20 581-407 not yet reported which blocks → Bell Canada 984C Cap-aux-Meules —
2023-07-20 586-341 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMEO MI
2023-07-20 601-330 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NATCHEZ MS
2023-07-20 659-273 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BIRMINGHAM AL
2023-07-20 662-901 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MS 719E MEMPHIS MS
2023-07-20 667-439 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 PIKESVILLE MD
2023-07-20 680-276 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H FULTON NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.