NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
2002-09-17 304-931 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 CLARKSBURG WV
2002-09-17 304-932 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 CHRLSTNZN1 WV
2002-09-17 304-933 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 BRIDGEPORT WV
2002-09-17 304-944 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 BERKELYSPG WV
2002-09-17 304-945 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 CHRLSTNZN5 WV
2002-09-17 505-705 1XXX3XXX6XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBUQURQUE NM
2002-09-17 507-401 2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MARSHALL MN
2002-09-17 513-359 not yet reported which blocks → SPOK, INC. 6630 CINCINNATI OH
2002-09-17 517-614 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LANSING MI
2002-09-17 520-236 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 SIERRAVIST AZ
2002-09-17 540-429 7XXX which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 FREDECKSBG VA
2002-09-17 541-406 0–9 XXXall 10 · 4 holders which blocks → ZIPLY FIBER, LLC 0760 BAKER OR
2002-09-17 574-226 0XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2002-09-17 574-358 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MIDDLEBURY IN
2002-09-17 614-516 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 WORTHINGTN OH
2002-09-17 616-780 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI
2002-09-17 616-799 6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CEDAR SPG MI
2002-09-17 616-826 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2002-09-17 716-908 none assigned yet which blocks → METROPCS, INC. 5562 WILLIAMSVL NY
2002-09-17 716-909 none assigned yet which blocks → METROPCS, INC. 5562 TONAWANDA NY
2002-09-17 734-787 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BELLEVILLE MI
2002-09-17 740-294 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J COSHOCTON OH
2002-09-17 810-569 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
2002-09-17 810-751 1XXX2XXX3XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CAPAC MI
2002-09-17 810-790 7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 IMLAY CITY MI
2002-09-17 812-586 2XXX3XXX8XXX9XXX · 2 holders which blocks → BLUERIVER COMMUNICATIONS, INC. - IN 8943 SALEM IN
2002-09-17 812-791 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BLUERIVER COMMUNICATIONS, INC. - IN 8943 ORLEANS IN
2002-09-17 928-230 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 LKHAVASUCY AZ
2002-09-17 928-852 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 SEDONA AZ
2002-09-17 937-631 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 SPRINGFLD OH
2002-09-17 937-638 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 SIDNEY OH
2002-09-17 989-415 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BAY CITY MI
2002-09-17 989-780 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
2002-09-16 408-329 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUNNYVALE CA
2002-09-16 440-316 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NORTHEATON OH
2002-09-16 517-554 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ALBION MI
2002-09-16 740-464 6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORTSMOUTH OH
2002-09-16 763-234 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TWINCITIES MN
2002-09-16 845-821 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 SPRING VLY NY
2002-09-16 940-225 not yet reported which blocks → WEB FIRE COMMUNICATIONS, INC. - TX 2985 VERNON TX
2002-09-12 253-880 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AUBURN WA
2002-09-12 253-881 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 PUYALLUP WA
2002-09-12 253-882 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2002-09-12 253-883 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 TACOMAWVLY WA
2002-09-12 541-418 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 LINCOLN CY OR
2002-09-12 601-690 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 COLUMBIA MS
2002-09-12 603-686 0–9 XXXall 10 · 3 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 EXETER NH
2002-09-12 614-383 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → AT&T - LOCAL 7421 GAHANNA OH
2002-09-12 662-576 0XXX1XXX2XXX3XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 RIPLEY MS
2002-09-12 662-586 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 PONTOTOC MS

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.