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
— 657-888 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E ORANGE CA
— 657-900 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SANTA ANA CA
— 657-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 657-950 not yet reported which blocks → CA
— 657-958 not yet reported which blocks → CA
— 657-959 not yet reported which blocks → CA
— 657-976 not yet reported which blocks → CA
— 657-999 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E ANAHEIM CA
— 659-205 1XXX2XXX3XXX4XXX5XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 ONEONTA AL
— 659-207 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E BIRMINGHAM AL
— 659-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AL
— 659-213 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 JASPER AL
— 659-236 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E DORA AL
— 659-267 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 JEMISON AL
— 659-287 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F TRUSSVILLE AL
— 659-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AL
— 659-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AL
— 659-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AL
— 659-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST AL
— 659-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AL
— 659-700 not yet reported which blocks → AL
— 659-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AL
— 659-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AL
— 659-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AL
— 659-950 not yet reported which blocks → AL
— 659-958 not yet reported which blocks → AL
— 659-959 not yet reported which blocks → AL
— 659-976 not yet reported which blocks → AL
— 660-200 1XXX4XXX8XXX9XXX · 4 holders which blocks → EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO 1811 BUTLER MO
— 660-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MO
— 660-213 not yet reported which blocks → MARK TWAIN COMMUNICATIONS 8953 LA BELLE MO
— 660-214 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHILLICOTH MO
— 660-215 1XXX2XXX3XXX5XXX7XXX8XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARYVILLE MO
— 660-216 none assigned yet which blocks → UNITED STATES CELLULAR - MO 6275 KIRKSVILLE MO
— 660-217 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COAL MO
— 660-221 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 SEDALIA MO
— 660-222 not yet reported which blocks → CHARITON VALLEY TEL. CO. 1864 BYNUMVILLE MO
— 660-224 1XXX2XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 MARYVILLE MO
— 660-226 not yet reported which blocks → CHARITON VALLEY TEL. CO. 1864 NEWCAMBRIA MO
— 660-229 5XXX6XXX8XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MARSHALL MO
— 660-237 not yet reported which blocks → CITIZENS TEL. CO. 1865 HIGGINSVL MO
— 660-239 none assigned yet which blocks → CHARITON VALLEY TEL. CO. 1864 ATLANTA MO
— 660-244 not yet reported which blocks → GRAND RIVER MUTUAL TEL CO 1888 PURDIN MO
— 660-247 4XXX6XXX7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHILLICOTH MO
— 660-248 0XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 FAYETTE MO
— 660-249 2XXX3XXX9XXX · 2 holders which blocks → ONVOY, LLC - MO 093F MALTA BEND MO
— 660-255 not yet reported which blocks → GREEN HILLS TEL. CORP. 1890 COWGILL MO
— 660-256 9XXX which blocks → WINDSTREAM MISSOURI, INC. 1885 ROTHVILLE MO
— 660-258 6XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 BROOKFIELD MO
— 660-259 0XXX1XXX8XXX · 3 holders which blocks → EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO 1811 LEXINGTON MO

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.