NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
2002-03-28 671-488 not yet reported which blocks → TELEGUAM HOLDINGS, LLC 3922 AGANA GU
2002-03-28 678-733 6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA GA
2002-03-28 678-758 none assigned yet which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2002-03-28 678-760 not yet reported which blocks → METROPCS, INC. 5562 COVINGTON GA
2002-03-28 678-768 not yet reported which blocks → METROPCS, INC. 5562 CONYERS GA
2002-03-28 678-851 not yet reported which blocks → METROPCS, INC. 5562 SOCIALCRCL GA
2002-03-28 706-516 1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM GEORGIA COMMUNICATIONS CORP. 4332 TUNNELHILL GA
2002-03-28 773-983 not yet reported which blocks → T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2002-03-28 808-820 not yet reported which blocks → SANDWICH ISLES COMMUNICATIONS, INC. 3021 LIHUE HI
2002-03-28 810-734 5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ALGONAC MI
2002-03-28 817-374 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WEATHERFD TX
2002-03-28 817-591 0XXX1XXX2XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ATLAS TX
2002-03-28 817-776 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GRANBURY TX
2002-03-28 828-338 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C FAIRVIEW NC
2002-03-28 830-225 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JOHNSON CY TX
2002-03-28 830-255 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CARRIZOSPG TX
2002-03-28 830-261 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 UVALDE TX
2002-03-28 830-265 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MARBLE FLS TX
2002-03-28 830-266 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LYTLE TX
2002-03-28 830-267 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PEARSALL TX
2002-03-28 830-268 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PLEASANTON TX
2002-03-28 830-443 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BOERNE TX
2002-03-28 830-455 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DEVINE TX
2002-03-28 830-483 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 COTULLA TX
2002-03-28 830-522 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BANDERA TX
2002-03-28 830-584 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HONDO TX
2002-03-28 936-585 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NACOGDOCHS TX
2002-03-28 936-657 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CENTER TX
2002-03-27 270-253 0–9 XXXall 10 · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C FRANKLIN KY
2002-03-27 316-621 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J EL DORADO KS
2002-03-27 316-836 1XXX2XXX5XXX7XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NEWTON KS
2002-03-27 321-302 2XXX3XXX4XXX5XXX7XXX · 2 holders which blocks → METROPCS NETWORKS, LLC 899D COCOA FL
2002-03-27 321-303 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 WINTERPARK FL
2002-03-27 484-201 0XXX1XXX2XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ALLENTOWN PA
2002-03-27 513-334 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LTL MIAMI OH
2002-03-27 517-631 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J WEBBERVL MI
2002-03-27 517-658 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J READING MI
2002-03-27 517-716 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J PARMA MI
2002-03-27 517-724 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J HOMER MI
2002-03-27 571-344 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2002-03-27 571-345 4XXX5XXX6XXX8XXX which blocks → VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2002-03-27 580-606 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 DUNCAN OK
2002-03-27 586-591 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J NEWBALTIMR MI
2002-03-27 586-710 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J UTICA MI
2002-03-27 717-383 2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 LEBANON PA
2002-03-27 717-858 1XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 YORK PA
2002-03-27 720-620 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2002-03-27 720-621 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2002-03-27 720-690 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2002-03-27 773-655 none assigned yet which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.