NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2018-01-12 445-777 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E YARDLEY PA
2018-01-12 445-800 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN3 PA
2018-01-12 445-888 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN2 PA
2018-01-12 445-999 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - PA 547E HARLEYSVL PA
2018-01-12 505-521 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2018-01-12 531-519 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → N.E. COLORADO CELLULAR, INC. 6874 WAYNE NE
2018-01-12 702-670 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV 9145 LAS VEGAS NV
2018-01-12 737-230 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2018-01-12 816-702 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K KANSASCITY MO
2018-01-12 913-413 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K KANSASCITY KS
2018-01-11 240-521 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2018-01-11 240-579 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2018-01-11 240-584 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2018-01-11 385-437 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SPANIHFORK UT
2018-01-11 412-598 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2018-01-11 437-538 not yet reported which blocks → Iristel Inc. 154E Toronto —
2018-01-11 470-744 0–9 XXXall 10 · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ATLANTA NW GA
2018-01-11 513-496 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LEBANON OH
2018-01-11 540-991 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 REMINGTON VA
2018-01-11 561-341 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 WPALMBEACH FL
2018-01-11 571-508 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2018-01-11 571-662 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2018-01-11 605-313 0–9 XXXwhole prefix which blocks → NORTHERN VALLEY COMMUNICATIONS, LLC 6125 REDFIELD SD
2018-01-11 639-960 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-11 639-961 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-11 639-962 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-11 639-963 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-11 720-632 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 DENVER CO
2018-01-11 720-992 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 DENVER CO
2018-01-11 769-759 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MS 719E UTICA MS
2018-01-11 947-205 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TROY MI
2018-01-10 213-770 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C LSAN DA 07 CA
2018-01-10 424-489 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SAN PEDRO CA
2018-01-10 639-860 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-10 639-861 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-10 639-862 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-10 639-863 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-10 639-864 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-10 639-865 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-10 639-866 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-10 639-867 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-10 639-868 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-10 639-869 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Moose Jaw —
2018-01-09 205-880 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E GRAYSVILLE AL
2018-01-09 340-202 not yet reported which blocks → LUMEN TECHNOLGIES ST. CROIX, LLC 128J ST CROIX VI
2018-01-09 340-249 not yet reported which blocks → LUMEN TECHNOLGIES ST. CROIX, LLC 128J CHTAMSTTHS VI
2018-01-09 340-489 not yet reported which blocks → LUMEN TECHNOLGIES ST. CROIX, LLC 128J CHNSTDSTCR VI
2018-01-09 340-625 not yet reported which blocks → LUMEN TECHNOLGIES ST. CROIX, LLC 128J FRKSTDSTCR VI
2018-01-09 469-380 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLANO TX
2018-01-09 479-324 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → VANTAGE TELECOM, LLC DBA NEWROADS TELECOM - AR 5018 RUSSELLVL AR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.