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 208
T-MOBILE USA, INC. 47
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
2021-05-24 208-671 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 MALTA ID
2019-09-27 208-607 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 IDAHOFALLS ID
2016-03-02 208-912 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BOISE ID
2015-12-08 208-509 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BOISE ID
2015-09-28 208-810 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BOISE ID
2015-01-13 208-809 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BOISE ID
2014-08-18 208-971 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BOISE ID
2013-08-22 208-982 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BOISE ID
2002-03-28 208-757 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 IDAHOFALLS ID
2002-03-28 208-760 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 POCATELLO ID
2002-03-28 208-948 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 TWIN FALLS ID
2001-11-02 208-608 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 BOISE ID
2001-09-12 208-794 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BOISE ID
2001-08-17 208-219 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BURLEY ID
2001-04-10 208-243 3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 IDAHOFALLS ID
2001-04-03 208-403 0XXX which blocks → T-MOBILE USA, INC. 6529 IDAHOFALLS ID
2001-04-03 208-405 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 PAYETTE ID
2001-04-03 208-406 0XXX2XXX5XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 POCATELLO ID
2001-03-21 208-450 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 KETCHUM ID
2001-02-22 208-573 8XXX which blocks → T-MOBILE USA, INC. 6529 BOISE ID
2001-02-20 208-407 4XXX6XXX8XXX which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-206 3XXX4XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 IDAHOFALLS ID
— 208-230 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 PAYETTE ID
— 208-280 4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 TWIN FALLS ID
— 208-283 not yet reported which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-284 not yet reported which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-290 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SANDPOINT ID
— 208-291 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 PAYETTE ID
— 208-305 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 LEWISTON ID
— 208-371 not yet reported which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-380 3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 POCATELLO ID
— 208-409 not yet reported which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-410 3XXX4XXX6XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 TWIN FALLS ID
— 208-412 0XXX2XXX4XXX which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-440 not yet reported which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-447 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-471 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 KETCHUM ID
— 208-503 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 LEWISTON ID
— 208-571 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-602 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-620 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 COERDALENE ID
— 208-640 2XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 COERDALENE ID
— 208-695 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-724 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-906 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-941 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BOISE ID
— 208-964 7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 COERDALENE ID

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.