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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2023-05-09 513-747 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 HAMILTON OH
2023-05-09 515-307 0XXX1XXX3XXX · 3 holders which blocks → MCC TELEPHONY OF IOWA, LLC - IA 751F WILLIAMS IA
2023-05-09 662-906 0XXX2XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H BYHALIA MS
2023-05-09 662-960 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H HERNANDO MS
2023-05-09 707-369 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H SANTA ROSA CA
2023-05-09 725-301 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 LAUGHLIN NV
2023-05-09 731-219 7XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H GIBSON TN
2023-05-09 934-999 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → YORKSTREAM COMMUNICATIONS LLC 977K CTRMORICHS NY
2023-05-09 956-840 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BROWNSVL TX
2023-05-09 983-222 0XXX2XXX · 2 holders which blocks → LEAP TELECOM, LLC 616J ROGGEN CO
2023-05-08 213-661 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2023-05-08 305-645 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2023-05-08 305-786 0–9 XXXall 10 · 4 holders which blocks → HADLO TECHNOLOGIES, LLC 436J MIAMI FL
2023-05-08 305-813 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NORTH DADE FL
2023-05-08 305-954 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2023-05-08 341-231 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2023-05-08 346-652 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 CYPRESS TX
2023-05-08 472-219 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAURINBURG NC
2023-05-08 650-661 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PACIFICA CA
2023-05-08 702-753 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H LAS VEGAS NV
2023-05-08 854-247 0XXX1XXX8XXX · 3 holders which blocks → BERKELEY CABLE TELEVISION INC DBA HOME TELECOM-SC 712C BONNEAU SC
2023-05-08 862-417 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BLOOMFIELD NJ
2023-05-08 878-274 1XXX2XXX3XXX4XXX5XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SLIPPERYRK PA
2023-05-05 239-446 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 FORT MYERS FL
2023-05-05 240-991 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2023-05-05 240-992 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2023-05-05 276-576 0XXX1XXX5XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H BIG ROCK VA
2023-05-05 276-767 0XXX1XXX6XXX7XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H MAXIE VA
2023-05-05 308-261 0XXX1XXX2XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 IMPERIAL NE
2023-05-05 346-651 0–9 XXXall 10 · 3 holders which blocks → HADLO TECHNOLOGIES, LLC 436J HOUSTON TX
2023-05-05 364-646 2XXX4XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H UNIONTOWN KY
2023-05-05 365-379 not yet reported which blocks → Iristel Inc. 154E Markham —
2023-05-05 369-888 1XXX2XXX8XXX9XXX · 4 holders which blocks → WIDE VOICE, LLC - CA 252F FERNDALE CA
2023-05-05 369-999 1XXX7XXX8XXX9XXX · 3 holders which blocks → WIDE VOICE, LLC - CA 252F KENWOOD CA
2023-05-05 385-532 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2023-05-05 401-445 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PROVIDENCE RI
2023-05-05 423-849 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JOHNSON CY TN
2023-05-05 505-556 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2023-05-05 505-568 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2023-05-05 534-216 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RHINELANDR WI
2023-05-05 571-638 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2023-05-05 573-862 1XXX which blocks → WINDSTREAM MISSOURI, INC. 1885 STELIZABTH MO
2023-05-05 581-403 not yet reported which blocks → Iristel Inc. 154E Quebec —
2023-05-05 656-217 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPAWST FL
2023-05-05 662-896 0XXX which blocks → ONVOY SPECTRUM, LLC 624H CARROLLTON MS
2023-05-05 662-898 0XXX which blocks → ONVOY SPECTRUM, LLC 624H TUTWILER MS
2023-05-05 667-434 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2023-05-05 689-305 0–9 XXXall 10 · 4 holders which blocks → HADLO TECHNOLOGIES, LLC 436J ORLANDO FL
2023-05-05 701-518 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BISMARCK ND
2023-05-05 726-240 0–9 XXXall 10 · 3 holders which blocks → HADLO TECHNOLOGIES, LLC 436J SANANTONIO TX

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.