NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2021-03-04 816-486 0XXX2XXX3XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - MO 093F MAYSVILLE MO
2021-03-04 816-687 0XXX2XXX3XXX8XXX · 3 holders which blocks → ONVOY, LLC - MO 093F SAVANNAH MO
2021-03-04 870-244 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J EARLE AR
2021-03-04 873-351 not yet reported which blocks → Fibernetics Corporation 464D La Patrie —
2021-03-04 873-352 not yet reported which blocks → Fibernetics Corporation 464D Lac-Drolet —
2021-03-04 873-366 not yet reported which blocks → Fibernetics Corporation 464D Richmond —
2021-03-04 873-367 not yet reported which blocks → Fibernetics Corporation 464D Sawyerville —
2021-03-04 873-368 not yet reported which blocks → Fibernetics Corporation 464D Scotstown —
2021-03-04 873-369 not yet reported which blocks → Fibernetics Corporation 464D South Durham —
2021-03-04 873-370 not yet reported which blocks → Fibernetics Corporation 464D St-Adolphe-de-Dudswell —
2021-03-04 952-248 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J TWINCITIES MN
2021-03-03 225-586 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PLAQUEMINE LA
2021-03-03 225-592 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ZACHARY LA
2021-03-03 240-910 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MD 876D FREDERICK MD
2021-03-03 256-866 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AL 604E KILLEN AL
2021-03-03 352-713 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SLRSPGSHRS FL
2021-03-03 417-504 0XXX1XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 AURORA MO
2021-03-03 417-774 0XXX2XXX4XXX · 3 holders which blocks → ONVOY, LLC - MO 093F JASPER MO
2021-03-03 430-299 2XXX3XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H MALAKOFF TX
2021-03-03 430-386 0XXX1XXX2XXX3XXX6XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H LONE OAK TX
2021-03-03 430-399 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H TAWAKONI TX
2021-03-03 430-667 0XXX1XXX5XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H MILLER GRV TX
2021-03-03 430-732 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H PITTSBURG TX
2021-03-03 430-786 0XXX4XXX6XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H TRINIDAD TX
2021-03-03 430-842 0XXX1XXX5XXX6XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H HONEYGROVE TX
2021-03-03 431-612 not yet reported which blocks → MTS Inc. 8088 Winnipeg —
2021-03-03 447-201 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → IP HORIZON LLC 515J CHAMPAURBN IL
2021-03-03 447-202 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → IP HORIZON LLC 515J SPRINGFLD IL
2021-03-03 458-261 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J EUGENE OR
2021-03-03 561-597 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2021-03-03 562-550 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 WHITTIER CA
2021-03-03 580-586 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → WICHITA ONLINE, INC. - OK 258F WAURIKA OK
2021-03-03 641-239 2XXX4XXX5XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AFTON IA
2021-03-03 667-810 5XXX6XXX7XXX8XXX which blocks → ONVOY, LLC - MD 876D SALISBURY MD
2021-03-03 667-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D BALTIMORE MD
2021-03-03 682-681 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C ARLINGTON TX
2021-03-03 682-882 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C FORT WORTH TX
2021-03-03 712-672 0XXX1XXX2XXX3XXX7XXX · 2 holders which blocks → ONVOY, LLC - IA 221F ROCKWELLCY IA
2021-03-03 715-918 3XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHERN WISCONSIN, LLC 0956 BOULDERJCT WI
2021-03-03 873-345 not yet reported which blocks → Fibernetics Corporation 464D Chartierville —
2021-03-03 873-346 not yet reported which blocks → Fibernetics Corporation 464D Cookshire —
2021-03-03 873-347 not yet reported which blocks → Fibernetics Corporation 464D Danville —
2021-03-03 873-348 not yet reported which blocks → Fibernetics Corporation 464D Deauville —
2021-03-03 873-349 not yet reported which blocks → Fibernetics Corporation 464D East Angus —
2021-03-03 873-350 not yet reported which blocks → Fibernetics Corporation 464D East Hereford —
2021-03-03 901-557 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TN 525E ARLINGTON TN
2021-03-03 914-451 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSCHSTZN03 NY
2021-03-03 915-955 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C EL PASO TX
2021-03-03 971-394 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J PORTLAND OR
2021-03-03 971-395 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SEASIDE OR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.