NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2023-01-11 516-963 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN04 NY
2023-01-11 516-964 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN06 NY
2023-01-11 530-907 0XXX1XXX3XXX5XXX7XXX9XXX · 2 holders which blocks → NUSO, LLC 732J CHICO CA
2023-01-11 559-815 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J FRESNO CA
2023-01-11 571-604 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2023-01-11 571-605 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DALE CITY VA
2023-01-11 582-229 6XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 JOHNSONBG PA
2023-01-11 602-637 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-01-11 618-909 1XXX7XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J BREESE IL
2023-01-11 618-913 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HERRIN IL
2023-01-11 620-580 0XXX1XXX2XXX4XXX8XXX9XXX · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 PARSONS KS
2023-01-11 620-606 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 FORT SCOTT KS
2023-01-11 623-212 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-01-11 628-281 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J SNFC CNTRL CA
2023-01-11 657-653 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2023-01-11 669-329 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2023-01-11 716-615 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMESTOWN NY
2023-01-11 734-540 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C WAYNE MI
2023-01-11 743-393 0XXX1XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - NC 638E WJEFFERSON NC
2023-01-11 747-324 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2023-01-11 747-329 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BRBN BRBN CA
2023-01-11 771-221 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN1 DC
2023-01-11 782-569 not yet reported which blocks → Fibernetics Corporation 464D Bridgewater —
2023-01-11 782-570 not yet reported which blocks → Fibernetics Corporation 464D Caledonia —
2023-01-11 782-571 not yet reported which blocks → Fibernetics Corporation 464D Chester —
2023-01-11 782-572 not yet reported which blocks → Fibernetics Corporation 464D Halifax —
2023-01-11 786-898 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 NORTH DADE FL
2023-01-11 786-902 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E KEYS FL
2023-01-11 786-905 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MIAMI FL
2023-01-11 786-912 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2023-01-11 835-213 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PHPHSBZN14 PA
2023-01-11 870-980 0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AR 348F GRUBBS AR
2023-01-11 929-661 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN15 NY
2023-01-11 943-214 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2023-01-11 945-285 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J KAUFMAN TX
2023-01-11 945-405 4XXX which blocks → ONVOY, LLC - TX 903C ITALY TX
2023-01-11 945-425 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C LEWISVILLE TX
2023-01-11 945-523 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C CARROLLTON TX
2023-01-11 949-712 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SADLBK VLY CA
2023-01-11 971-443 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SALEM OR
2023-01-11 980-608 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLC - NC 638E CLEVELAND NC
2023-01-11 984-320 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 LOUISBURG NC
2023-01-10 224-492 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NORTHBROOK IL
2023-01-10 253-362 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - WA 483E SUMNER WA
2023-01-10 253-452 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WA 483E KENT WA
2023-01-10 269-550 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 KALAMAZOO MI
2023-01-10 331-293 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AURORA IL
2023-01-10 352-802 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C HAWTHORNE FL
2023-01-10 365-643 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2023-01-10 367-898 not yet reported which blocks → Bell Mobility 6574 Chicoutimi —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.