NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2020-03-09 438-456 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-03-09 438-457 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-03-09 479-380 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FAYETTEVL AR
2020-03-09 571-456 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TRIANGLE VA
2020-03-09 573-536 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TAOS MO
2020-03-09 631-908 0–9 XXXall 10 · 6 holders which blocks → CSC VOICE, LLC 612K PATCHOGUE NY
2020-03-09 667-263 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DUNDALK MD
2020-03-09 667-278 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
2020-03-09 828-882 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E CULLOWHEE NC
2020-03-09 901-499 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ARLINGTON TN
2020-03-09 986-689 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - ID 689F GRANGEVL ID
2020-03-06 202-519 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DC 6117 WSHNGTNZN1 DC
2020-03-06 205-947 0–9 XXXall 10 · 4 holders which blocks → AT&T - LOCAL 7421 CARBONHILL AL
2020-03-06 219-264 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMMOND IN
2020-03-06 256-795 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 ATHENS AL
2020-03-06 331-264 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HINSDALE IL
2020-03-06 437-623 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-03-06 479-379 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 SPRINGDALE AR
2020-03-06 802-317 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 ARLINGTON VT
2020-03-05 213-474 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2020-03-05 463-300 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H GREENWOOD IN
2020-03-05 463-465 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H NEWPALSTIN IN
2020-03-05 470-568 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2020-03-05 480-618 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2020-03-05 484-745 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHPHSBZN10 PA
2020-03-05 602-654 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2020-03-05 602-932 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2020-03-05 608-806 0XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WI 225C FAIRPLAY WI
2020-03-05 619-705 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J SNDG SNDG CA
2020-03-05 623-254 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 PHOENIX AZ
2020-03-05 623-663 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2020-03-04 202-938 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN1 DC
2020-03-04 631-550 0–9 XXXwhole prefix which blocks → LTE WIRELESS INC D/B/A LTE WIRELESS - NY 452J YAPHANK NY
2020-03-04 806-750 0XXX which blocks → PANHANDLE TELECOMMUNICATION SYSTEMS, INC. - TX 6944 HIGGINS TX
2020-03-04 845-550 0–9 XXXwhole prefix which blocks → LTE WIRELESS INC D/B/A LTE WIRELESS - NY 452J WOODSTOCK NY
2020-03-04 929-539 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2020-03-03 205-946 0–9 XXXall 10 · 6 holders which blocks → AIRUS, INC. - AL 476H BIRMINGHAM AL
2020-03-03 309-570 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J PEORIA IL
2020-03-03 437-622 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-03-03 469-794 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LEWISVILLE TX
2020-03-03 626-547 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EL MONTE CA
2020-03-03 914-550 0–9 XXXwhole prefix which blocks → LTE WIRELESS INC D/B/A LTE WIRELESS - NY 452J CHAPPAQUA NY
2020-03-03 956-528 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAREDO TX
2020-03-02 208-294 1XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - ID 7558 FRUITLAND ID
2020-03-02 414-348 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MILWAUKZN4 WI
2020-03-02 414-842 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H MILWAUKZN1 WI
2020-03-02 437-620 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-03-02 437-621 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-03-02 910-883 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ROCKINGHAM NC
2020-02-28 580-505 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOODWARD OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.