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
— 352-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX FL
— 352-950 not yet reported which blocks → FL
— 352-955 4XXX8XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 GAINESVL FL
— 352-958 not yet reported which blocks → FL
— 352-959 not yet reported which blocks → FL
— 352-976 not yet reported which blocks → FL
— 352-978 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLERMONT FL
— 352-988 1XXX2XXX5XXX6XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLERMONT FL
— 352-989 4XXX5XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CLERMONT FL
— 352-999 3XXX4XXX5XXX7XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 DADE CITY FL
— 353-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 353-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 353-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 353-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 353-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST WI
— 353-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 353-700 not yet reported which blocks → WI
— 353-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 353-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 353-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WI
— 353-950 not yet reported which blocks → WI
— 353-958 not yet reported which blocks → WI
— 353-959 not yet reported which blocks → WI
— 353-976 not yet reported which blocks → WI
— 357-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST CA
— 357-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-700 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-950 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-958 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-959 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 357-976 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 360-200 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LONGVIEW WA
— 360-201 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WHATCOMCTY WA
— 360-202 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MT VERNON WA
— 360-204 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 SILVERDALE WA
— 360-205 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELFAIR WA
— 360-207 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WA 006F PT ANGELES WA
— 360-210 1XXX2XXX3XXX6XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J CAMAS WA
— 360-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 360-212 not yet reported which blocks → QWEST CORPORATION 9638 VANCOUVER WA
— 360-213 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
— 360-214 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 LONG BEACH WA
— 360-215 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PORTLUDLOW WA

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.