NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 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
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
2022-06-10 364-664 4XXX6XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H MADISONVL KY
2022-06-10 386-368 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H DAYTONABCH FL
2022-06-10 507-817 0XXX1XXX9XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MARSHALL MN
2022-06-10 507-819 0XXX1XXX8XXX9XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CANNON FLS MN
2022-06-10 507-892 6XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 PINEISLAND MN
2022-06-10 531-270 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 OMAHA NE
2022-06-10 606-227 0–9 XXXall 10 · 5 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C GRAYSON KY
2022-06-10 719-483 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J TRINIDAD CO
2022-06-10 727-591 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C TARPON SPG FL
2022-06-10 727-594 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C STPETERSBG FL
2022-06-10 762-310 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATHENS GA
2022-06-10 808-580 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HONOLULU HI
2022-06-10 831-259 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MONTEREY CA
2022-06-10 831-270 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SALINAS CA
2022-06-10 859-390 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C MTSTERLING KY
2022-06-10 863-249 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C AVON PARK FL
2022-06-10 941-231 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C SARASOTA FL
2022-06-10 970-504 0XXX1XXX2XXX3XXX5XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J CARBONDALE CO
2022-06-09 224-463 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 GLENVIEW IL
2022-06-09 326-206 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 SIDNEY OH
2022-06-09 352-607 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C CITRA FL
2022-06-09 352-752 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - FL 937C TRILACOCHE FL
2022-06-09 602-853 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D PHOENIX AZ
2022-06-09 612-410 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MN 8405 TWINCITIES MN
2022-06-09 612-485 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MN 8405 TWINCITIES MN
2022-06-09 629-278 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F NASHVILLE TN
2022-06-09 657-610 0–9 XXXall 10 · 3 holders which blocks → BARR TELL USA, LLC 026K SANTA ANA CA
2022-06-09 657-770 0–9 XXXall 10 · 2 holders which blocks → BARR TELL USA, LLC 026K WESTMINSTR CA
2022-06-09 727-590 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 STPETERSBG FL
2022-06-09 747-355 0–9 XXXall 10 · 3 holders which blocks → BARR TELL USA, LLC 026K NO HOLLYWD CA
2022-06-09 754-287 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C POMPANOBCH FL
2022-06-09 754-289 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C DEERFLDBCH FL
2022-06-09 826-699 9XXX which blocks → TERRA NOVA TELECOM INC. 145J HARRISONBG VA
2022-06-09 984-308 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 RALEIGH NC
2022-06-08 208-299 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → RURAL NETWORK SERVICES, INC. - ID 3268 WEISER ID
2022-06-08 209-960 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 TURLOCK CA
2022-06-08 305-561 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2022-06-08 484-761 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
2022-06-08 484-815 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D W CHESTER PA
2022-06-08 484-963 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - PA 547E PHPHSBZN13 PA
2022-06-08 513-957 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SEVEN MILE OH
2022-06-08 513-960 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 HAMILTON OH
2022-06-08 561-871 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2022-06-08 561-872 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C BOCA RATON FL
2022-06-08 561-873 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 BOCA RATON FL
2022-06-08 657-602 0–9 XXXall 10 · 2 holders which blocks → BARR TELL USA, LLC 026K ANAHEIM CA
2022-06-08 707-952 0–9 XXXall 10 · 5 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L UKIAH CA
2022-06-08 786-846 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2022-06-08 786-854 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2022-06-08 786-874 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL

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.