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
— 361-980 6XXX7XXX which blocks → SOUTHWESTERN BELL 9533 C CHRISTI TX
— 361-983 0XXX8XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 PT OCONNOR TX
— 361-985 not yet reported which blocks → SOUTHWESTERN BELL 9533 C CHRISTI TX
— 361-986 2XXX3XXX which blocks → SOUTHWESTERN BELL 9533 C CHRISTI TX
— 361-987 0XXX1XXX9XXX · 3 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 PT COMFORT TX
— 361-991 not yet reported which blocks → SOUTHWESTERN BELL 9533 C CHRISTI TX
— 361-992 not yet reported which blocks → SOUTHWESTERN BELL 9533 C CHRISTI TX
— 361-993 not yet reported which blocks → SOUTHWESTERN BELL 9533 C CHRISTI TX
— 361-994 not yet reported which blocks → SOUTHWESTERN BELL 9533 C CHRISTI TX
— 361-998 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 AGUA DULCE TX
— 363-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 363-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 363-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 363-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 363-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST NY
— 363-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 363-700 not yet reported which blocks → NY
— 363-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 363-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 363-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 363-950 not yet reported which blocks → NY
— 363-958 not yet reported which blocks → NY
— 363-959 not yet reported which blocks → NY
— 363-976 not yet reported which blocks → NY
— 364-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX KY
— 364-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX KY
— 364-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX KY
— 364-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX KY
— 364-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST KY
— 364-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX KY
— 364-700 not yet reported which blocks → KY
— 364-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX KY
— 364-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX KY
— 364-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX KY
— 364-950 not yet reported which blocks → KY
— 364-958 not yet reported which blocks → KY
— 364-959 not yet reported which blocks → KY
— 364-976 not yet reported which blocks → KY
— 369-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 369-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 369-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 369-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 369-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST CA
— 369-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 369-700 not yet reported which blocks → CA
— 369-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 369-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 369-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT CA
— 369-950 not yet reported which blocks → CA
— 369-958 not yet reported which blocks → CA

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.