NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2002-10-16 309-474 1XXX2XXX4XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC 224C VARNA IL
2002-10-16 309-480 1XXX4XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC 224C CASTLETON IL
2002-10-16 309-481 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WASHINGTON IL
2002-10-16 309-492 2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC 224C CAMPGROVE IL
2002-10-16 309-580 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC 224C MOSSVILLE IL
2002-10-16 309-595 5XXX7XXX9XXX · 2 holders which blocks → ONVOY, LLC 224C NEPONSET IL
2002-10-16 309-670 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E PEORIA IL
2002-10-16 309-702 2XXX3XXX9XXX · 2 holders which blocks → ONVOY, LLC 224C WYOMING IL
2002-10-16 309-739 1XXX2XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SECOR IL
2002-10-16 309-741 1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → ONVOY, LLC 224C ELMWOOD IL
2002-10-16 309-818 7XXX8XXX9XXX which blocks → ONVOY SPECTRUM, LLC 624H BLOOMINGTN IL
2002-10-16 309-851 none assigned yet which blocks → FRONTIER NORTH, INC. - IL 1015 KEWANEE IL
2002-10-16 309-894 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC 224C BUDA IL
2002-10-16 309-898 1XXX3XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC 224C BRADFORD IL
2002-10-16 309-899 2XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC 224C ELMIRA IL
2002-10-16 309-929 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC 224C TREMONT IL
2002-10-16 309-964 1XXX2XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → ONVOY, LLC 224C GOODFIELD IL
2002-10-16 321-446 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 COCOA FL
2002-10-16 479-233 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GENTRY AR
2002-10-16 501-283 7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BALD KNOB AR
2002-10-16 501-284 5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JUDSONIA AR
2002-10-16 501-285 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ENGLAND AR
2002-10-16 541-817 0–9 XXXall 10 · 2 holders which blocks → QWEST CORPORATION 9638 ROSEBURG OR
2002-10-16 706-488 not yet reported which blocks → PAETEC ITEL, LLC 829J HAMILTON GA
2002-10-16 706-489 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J PINE MT GA
2002-10-16 708-691 5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2002-10-16 773-715 1XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2002-10-16 773-727 8XXX which blocks → T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2002-10-16 773-817 not yet reported which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2002-10-16 786-399 not yet reported which blocks → METROPCS, INC. 5562 PERRINE FL
2002-10-16 813-486 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TAMPA FL
2002-10-16 850-538 not yet reported which blocks → PAETEC ITEL, LLC 829J CRAWFORDVL FL
2002-10-16 850-766 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 TALLAHASSE FL
2002-10-16 862-228 6XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 POMPTONLKS NJ
2002-10-16 870-370 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STAR CITY AR
2002-10-16 870-371 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALEM AR
2002-10-16 870-372 5XXX6XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLARENDON AR
2002-10-16 870-373 5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MELBOURNE AR
2002-10-16 870-374 6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GOULD AR
2002-10-16 908-922 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 PLAINFIELD NJ
2002-10-16 908-938 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SOMERVILLE NJ
2002-10-16 941-445 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 VENICE FL
2002-10-16 970-575 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 FRASER CO
2002-10-16 970-576 3XXX4XXX7XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 GREELEY CO
2002-10-16 989-816 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ELSIE MI
2002-10-15 240-291 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAGERSTOWN MD
2002-10-15 240-344 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FREDERICK MD
2002-10-15 308-708 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - NE 6263 KEARNEY NE
2002-10-15 580-670 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 BLACKWELL OK
2002-10-15 661-695 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7128 BKFD NORTH CA

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.