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
2020-07-28 326-345 0XXX1XXX2XXX5XXX6XXX · 5 holders which blocks → FRACTEL, LLC 965H DE GRAFF OH
2020-07-28 326-465 0XXX1XXX2XXX4XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H RIDGEWAY OH
2020-07-28 346-428 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 478J HOUSTON TX
2020-07-28 385-307 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2020-07-28 385-356 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H AMERCNFORK UT
2020-07-28 385-688 0XXX6XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H GOSHEN UT
2020-07-28 385-758 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CLEARFIELD UT
2020-07-28 385-842 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H KAYSVILLE UT
2020-07-28 385-855 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MIDVALE UT
2020-07-28 385-946 0XXX3XXX · 2 holders which blocks → FRACTEL, LLC 965H EAGLE MTN UT
2020-07-28 412-679 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON7 PA
2020-07-28 458-356 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H EUGENE OR
2020-07-28 458-529 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H PHOENIX OR
2020-07-28 458-946 0XXX1XXX3XXX4XXX · 4 holders which blocks → FRACTEL, LLC 965H RIDDLE OR
2020-07-28 469-851 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J DALLAS TX
2020-07-28 470-730 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D ADAIRSVL GA
2020-07-28 480-698 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2020-07-28 619-689 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-07-28 629-242 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F NASHVILLE TN
2020-07-28 639-301 not yet reported which blocks → SaskTel Mobility 9868 Weyburn —
2020-07-28 639-302 not yet reported which blocks → SaskTel Mobility 9868 Estevan —
2020-07-28 639-303 not yet reported which blocks → SaskTel Mobility 9868 Yorkton —
2020-07-28 639-304 not yet reported which blocks → SaskTel Mobility 9868 Moose Jaw —
2020-07-28 639-417 not yet reported which blocks → SaskTel 8091 North Battleford —
2020-07-28 639-650 not yet reported which blocks → SaskTel 8091 Estevan —
2020-07-28 639-651 not yet reported which blocks → SaskTel 8091 Moose Jaw —
2020-07-28 639-780 not yet reported which blocks → SaskTel 8091 Swift Current —
2020-07-28 639-807 not yet reported which blocks → SaskTel 8091 Lloydminster —
2020-07-28 639-823 not yet reported which blocks → SaskTel 8091 Yorkton —
2020-07-28 639-850 not yet reported which blocks → SaskTel 8091 Weyburn —
2020-07-28 639-964 not yet reported which blocks → SaskTel 8091 Prince Albert —
2020-07-28 657-447 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2020-07-28 661-503 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PLDL PLDL CA
2020-07-28 779-275 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J ROCKFORD IL
2020-07-28 779-276 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J DE KALB IL
2020-07-28 839-400 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FORT MILL SC
2020-07-28 909-817 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 POMONA CA
2020-07-28 909-832 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 S BERNDINO CA
2020-07-28 928-391 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 KINGMAN AZ
2020-07-28 929-551 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2020-07-28 971-842 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H ST HELENS OR
2020-07-28 971-977 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H TILLAMOOK OR
2020-07-28 984-345 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CARY NC
2020-07-27 252-855 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H RICHSQUARE NC
2020-07-27 502-754 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J LOUISVILLE KY
2020-07-27 571-877 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LORTONMTRO VA
2020-07-27 636-335 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 FENTON MO
2020-07-27 743-300 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H DANBURY NC
2020-07-27 743-356 0XXX2XXX3XXX4XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H DENTON NC
2020-07-27 743-400 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H EDEN NC

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.