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
2002-09-12 662-593 3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 IUKA MS
2002-09-12 662-594 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CORINTH MS
2002-09-12 662-596 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BOONEVILLE MS
2002-09-12 662-597 1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 AMORY MS
2002-09-12 662-598 1XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 NEW ALBANY MS
2002-09-12 702-234 not yet reported which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2002-09-12 702-292 not yet reported which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2002-09-12 702-325 not yet reported which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2002-09-12 702-327 not yet reported which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2002-09-12 702-328 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2002-09-12 702-336 not yet reported which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2002-09-12 936-647 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2002-09-12 979-246 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NEEDVILLE TX
2002-09-11 250-688 not yet reported which blocks → TELUS Mobility 8301 Invermere —
2002-09-11 250-919 not yet reported which blocks → TELUS Mobility 8301 Cranbrook —
2002-09-11 330-612 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AKRON OH
2002-09-11 330-635 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MEDINA OH
2002-09-11 416-388 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2002-09-11 417-262 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → UNITED STATES CELLULAR - MO 6275 LAMAR MO
2002-09-11 509-977 1XXX2XXX4XXX7XXX9XXX · 4 holders which blocks → INLAND CELLULAR LLC 1477 CRESTON WA
2002-09-11 509-978 1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 NESPELEM WA
2002-09-11 509-983 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 STARBUCK WA
2002-09-11 740-462 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MT VERNON OH
2002-09-11 740-485 6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MT VERNON OH
2002-09-11 832-233 none assigned yet which blocks → METROPCS, INC. 5562 HUMBLE TX
2002-09-11 870-221 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 MARSHALL AR
2002-09-11 937-247 0–9 XXXall 10 · 4 holders which blocks → CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B MSBGWCRLTN OH
2002-09-11 937-619 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B CENTERVLLE OH
2002-09-10 209-688 not yet reported which blocks → METROPCS, INC. 5562 STOCKTON CA
2002-09-10 218-336 none assigned yet which blocks → ONVOY, LLC - MN 184D DULUTH MN
2002-09-10 251-227 4XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 EVERGREEN AL
2002-09-10 251-363 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BREWTON AL
2002-09-10 252-588 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - NC 6282 OCRACOKE NC
2002-09-10 254-232 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LAGUNA PK TX
2002-09-10 334-296 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 MONTGOMERY AL
2002-09-10 417-855 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 WILLOW SPG MO
2002-09-10 586-797 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 UTICA MI
2002-09-10 601-609 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 JACKSON MS
2002-09-10 601-610 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 HATTIESBG MS
2002-09-10 601-614 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MERIDIAN MS
2002-09-10 601-621 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MERIDIAN MS
2002-09-10 601-627 1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 NEWTONHKRY MS
2002-09-10 618-319 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CARBONDALE IL
2002-09-10 618-688 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J EDGEMONT IL
2002-09-10 618-912 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BRIDGEPORT IL
2002-09-10 618-946 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JERSEYVL IL
2002-09-10 646-423 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2002-09-10 660-299 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 EDINA MO
2002-09-10 740-416 6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POMEROY OH
2002-09-10 740-418 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON OH

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.