NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, all time — NPA 432
SOUTHWESTERN BELL 79
NEW CINGULAR WIRELESS PCS, LLC - IL 35
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 32
ONVOY, LLC - TX 29
26
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
— 432-398 not yet reported which blocks → WES-TEX TELEPHONE COOP., INC. 2168 LOMAX TX
— 432-399 not yet reported which blocks → WES-TEX TELEPHONE COOP., INC. 2168 LUTHER TX
— 432-409 not yet reported which blocks → TX
— 432-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 432-424 not yet reported which blocks → BIG BEND TEL. CO., INC. 2039 LAJITAS TX
— 432-425 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 TERMINAL TX
— 432-426 0XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 FORT DAVIS TX
— 432-430 not yet reported which blocks → TX
— 432-432 not yet reported which blocks → TX
— 432-438 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 ODESSA TX
— 432-445 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 PECOS TX
— 432-447 8XXX which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 PECOS TX
— 432-448 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 PECOS TX
— 432-457 not yet reported which blocks → VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 1163 FORSAN TX
— 432-458 not yet reported which blocks → WES-TEX TELEPHONE COOP., INC. 2168 W STANTON TX
— 432-459 not yet reported which blocks → WES-TEX TELEPHONE COOP., INC. 2168 LENORAH TX
— 432-464 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 ANDREWS TX
— 432-466 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 BIG SPRING TX
— 432-467 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 VALENTINE TX
— 432-469 not yet reported which blocks → TX
— 432-477 not yet reported which blocks → BIG BEND TEL. CO., INC. 2039 BGBNNTNLPK TX
— 432-488 6XXX7XXX8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 TERMINAL TX
— 432-495 not yet reported which blocks → SOUTHWESTERN BELL 9533 TERMINAL TX
— 432-498 not yet reported which blocks → SOUTHWESTERN BELL 9533 TERMINAL TX
— 432-499 not yet reported which blocks → SOUTHWESTERN BELL 9533 TERMINAL TX
— 432-505 3XXX4XXX which blocks → ONVOY, LLC - TX 903C MIDLAND TX
— 432-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 432-512 not yet reported which blocks → TX
— 432-520 not yet reported which blocks → SOUTHWESTERN BELL 9533 MIDLAND TX
— 432-522 0XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 MIDLAND TX
— 432-523 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 ANDREWS TX
— 432-524 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 ANDREWS TX
— 432-527 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 WINK TX
— 432-528 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TERMINAL TX
— 432-530 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ODESSA TX
— 432-535 0XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 MIDKIFF TX
— 432-536 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 IMPERIAL TX
— 432-547 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 GRANDFALLS TX
— 432-550 not yet reported which blocks → SOUTHWESTERN BELL 9533 ODESSA TX
— 432-552 0XXX5XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ODESSA TX
— 432-553 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TERMINAL TX
— 432-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST TX
— 432-556 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 TERMINAL TX
— 432-557 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 TERMINAL TX
— 432-558 0XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 CRANE TX
— 432-559 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TERMINAL TX
— 432-560 not yet reported which blocks → SOUTHWESTERN BELL 9533 TERMINAL TX
— 432-561 not yet reported which blocks → SOUTHWESTERN BELL 9533 TERMINAL TX
— 432-563 not yet reported which blocks → SOUTHWESTERN BELL 9533 TERMINAL TX
— 432-567 not yet reported which blocks → SOUTHWESTERN BELL 9533 TERMINAL TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.