NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2021-08-05 657-552 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2021-08-05 657-558 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-08-05 708-470 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLUEISLAND IL
2021-08-05 708-618 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2021-08-05 747-499 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H VAN NUYS CA
2021-08-05 772-789 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 VERO BEACH FL
2021-08-05 820-432 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H NEWBURYPRK CA
2021-08-05 820-667 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H OXNARD CA
2021-08-05 820-786 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ATASCADERO CA
2021-08-05 825-520 not yet reported which blocks → Iristel Inc. 154E Brooks —
2021-08-05 858-844 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H EL CAJON CA
2021-08-05 858-933 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H DEL MAR CA
2021-08-05 925-633 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CONCORD CA
2021-08-05 925-733 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H DANVILLE CA
2021-08-05 929-589 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN10 NY
2021-08-05 929-591 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2021-08-05 929-933 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NWYRCYZN11 NY
2021-08-05 934-599 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SELDEN NY
2021-08-05 934-667 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BRENTWOOD NY
2021-08-04 234-306 0XXX3XXX6XXX7XXX which blocks → ONVOY, LLC - OH 464C HARTFORD OH
2021-08-04 251-361 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 MOBILE AL
2021-08-04 314-901 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LADUE MO
2021-08-04 520-542 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 TUCSON AZ
2021-08-04 539-386 0XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H RIPLEY OK
2021-08-04 539-432 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BRISTOW OK
2021-08-04 539-567 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SAPULPA OK
2021-08-04 539-667 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H OKMULGEE OK
2021-08-04 539-758 0XXX1XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H DEPEW OK
2021-08-04 539-789 0XXX6XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H FORTGIBSON OK
2021-08-04 539-842 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H JENKS OK
2021-08-04 680-977 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H EVANSMILLS NY
2021-08-04 689-345 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WINTERPARK FL
2021-08-04 813-851 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E TAMPAWST FL
2021-08-04 912-933 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H RICHMONDHL GA
2021-08-04 920-701 1XXX2XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 LOMIRA WI
2021-08-03 216-418 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2021-08-03 216-499 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H TERRACE OH
2021-08-03 216-667 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CLEVELAND OH
2021-08-03 220-345 0XXX2XXX3XXX5XXX6XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H LETART FLS OH
2021-08-03 223-386 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CHAMBERSBG PA
2021-08-03 224-391 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2021-08-03 224-396 0XXX3XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 BARRINGTON IL
2021-08-03 224-397 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ALGONQUIN IL
2021-08-03 234-866 0XXX1XXX2XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H HANOVERTON OH
2021-08-03 276-255 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WISE VA
2021-08-03 331-274 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 AURORA IL
2021-08-03 331-275 2XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BARTLETT IL
2021-08-03 440-955 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H BAINBRIDGE OH
2021-08-03 440-966 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H STRONGSVL OH
2021-08-03 561-971 0–9 XXXall 10 · 7 holders which blocks → BARR TELL USA, LLC 632K WPALMBEACH FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.