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 918
T-MOBILE USA, INC. 49
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
2020-08-12 918-882 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BROKENARRW OK
2019-04-15 918-883 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BARTLESVL OK
2012-05-15 918-780 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-05-15 918-901 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-03-26 918-206 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-03-13 918-904 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2012-03-08 918-889 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2011-07-11 918-565 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2011-04-21 918-892 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TULSA OK
2002-07-05 918-707 1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 EUFAULA OK
2002-05-21 918-718 0XXX2XXX4XXX5XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 TAHLEQUAH OK
2002-05-21 918-908 1XXX2XXX3XXX4XXX5XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 STROUD OK
2002-05-21 918-926 1XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHECOTAH OK
2002-04-26 918-820 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MCALESTER OK
2002-04-26 918-860 2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 DEWEY OK
2002-04-26 918-873 1XXX3XXX6XXX7XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 CUSHING OK
— 918-213 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 BARTLESVL OK
— 918-269 2XXX which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-271 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-289 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-320 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MIAMI OK
— 918-327 2XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 BARTLESVL OK
— 918-329 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 MCALESTER OK
— 918-340 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-350 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BARTLESVL OK
— 918-360 none assigned yet which blocks → T-MOBILE USA, INC. 6529 MUSKOGEE OK
— 918-361 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-406 0XXX which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-407 0XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-408 0XXX which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-409 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-442 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-537 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 MUSKOGEE OK
— 918-777 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 OKMULGEE OK
— 918-808 none assigned yet which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-809 none assigned yet which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-810 none assigned yet which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-812 not yet reported which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-813 4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-814 1XXX which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-815 1XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 BARTLESVL OK
— 918-816 2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 MUSKOGEE OK
— 918-830 none assigned yet which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-840 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MUSKOGEE OK
— 918-841 3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 BARTLESVL OK
— 918-850 not yet reported which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-851 not yet reported which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-852 not yet reported which blocks → T-MOBILE USA, INC. 6529 TULSA OK
— 918-853 not yet reported which blocks → T-MOBILE USA, INC. 6529 TULSA OK

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.