NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
2020-10-05 765-556 0XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H CUTLER IN
2020-10-05 857-367 0–9 XXXall 10 · 3 holders which blocks → TC SYSTEMS, INC. 7135 WATERTOWN MA
2020-10-05 986-566 1XXX2XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H CRAIGMONT ID
2020-10-05 986-677 6XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H FREEDOM ID
2020-10-02 281-868 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BAYTOWN TX
2020-10-02 405-981 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BETHANY OK
2020-10-02 414-261 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J MILWAUKZN1 WI
2020-10-02 470-654 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D ATLANTA GA
2020-10-02 470-665 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D CONYERS GA
2020-10-02 470-748 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D ATLANTA NW GA
2020-10-02 479-433 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AR 348F WALDRON AR
2020-10-02 479-447 0XXX4XXX5XXX7XXX · 3 holders which blocks → ONVOY, LLC - AR 348F MANSFIELD AR
2020-10-02 479-467 0XXX1XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - AR 348F CHARLESTON AR
2020-10-02 480-801 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J PHOENIX AZ
2020-10-02 501-521 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AR 348F HOTSPRINGS AR
2020-10-02 520-530 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E TUCSON AZ
2020-10-02 540-824 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J BLACKSBURG VA
2020-10-02 608-722 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J MADISON WI
2020-10-02 612-451 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D TWINCITIES MN
2020-10-02 612-452 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J TWINCITIES MN
2020-10-02 620-599 0XXX1XXX5XXX6XXX9XXX · 4 holders which blocks → ONVOY, LLC - KS 205F PRESTON KS
2020-10-02 620-610 0XXX1XXX2XXX · 2 holders which blocks → ONVOY, LLC - KS 205F FALL RIVER KS
2020-10-02 620-630 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - KS 205F RIVERTON KS
2020-10-02 620-667 0–9 XXXall 10 · 9 holders which blocks → ONVOY, LLC - KS 205F COTONWDFLS KS
2020-10-02 681-349 0–9 XXXall 10 · 5 holders which blocks → HD CARRIER LLC 321J MORGANTOWN WV
2020-10-02 725-239 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D LAS VEGAS NV
2020-10-02 740-790 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C MCARTHUR OH
2020-10-02 763-338 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J TWINCITIES MN
2020-10-02 785-705 7XXX8XXX which blocks → ONVOY, LLC - KS 205F MICHIGNVLY KS
2020-10-02 785-755 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - KS 205F MINNEAPOLS KS
2020-10-02 785-780 0XXX1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - KS 205F SOLOMON KS
2020-10-02 785-795 0XXX2XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - KS 205F HERNDON KS
2020-10-02 785-881 0XXX1XXX2XXX3XXX9XXX · 4 holders which blocks → ONVOY, LLC - KS 205F OBERLIN KS
2020-10-02 785-886 1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - KS 205F SENECA KS
2020-10-02 785-975 0XXX5XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - KS 205F SOUTHHARDY KS
2020-10-02 785-977 7XXX8XXX which blocks → ONVOY, LLC - KS 205F POMONA KS
2020-10-02 831-215 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J MONTEREY CA
2020-10-02 872-274 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J CHICGOZN04 IL
2020-10-02 913-391 0–9 XXXall 10 · 5 holders which blocks → HD CARRIER LLC 321J KANSASCITY KS
2020-10-02 913-733 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - KS 205F DE SOTO KS
2020-10-02 920-384 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J GREEN BAY WI
2020-10-02 928-644 4XXX6XXX · 2 holders which blocks → FRACTEL, LLC 965H COLORADOCY AZ
2020-10-02 928-744 4XXX6XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H ALPINE AZ
2020-10-02 928-822 2XXX4XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H FREDONIA AZ
2020-10-02 928-844 4XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H LITTLEFLD AZ
2020-10-02 928-866 2XXX6XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H MESQUITCRK AZ
2020-10-02 928-944 4XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H AZ VILLAGE AZ
2020-10-02 928-946 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SAFFORD AZ
2020-10-02 928-966 3XXX6XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H SAN CARLOS AZ
2020-10-02 986-247 4XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H ATLANTA ID

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.