NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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 210
T-MOBILE USA, INC. 94
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
— 210-325 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-326 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-363 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-364 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-365 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-367 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-373 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-378 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-379 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-385 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-386 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-387 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-389 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-391 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-392 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-393 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-421 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-445 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-473 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-535 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-559 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-573 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-618 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-639 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-643 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-663 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-669 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-685 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-710 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-723 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-724 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-725 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-744 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-771 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-789 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-825 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-843 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-849 not yet reported which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-857 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-884 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-885 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-887 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-889 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
— 210-900 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.