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 847
T-MOBILE USA, INC. 54
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
2005-02-16 847-346 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2004-02-27 847-890 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2002-03-13 847-208 not yet reported which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
2001-06-21 847-445 none assigned yet which blocks → T-MOBILE USA, INC. 6529 WAUKEGAN IL
2001-05-10 847-912 not yet reported which blocks → T-MOBILE USA, INC. 6529 ZION IL
2001-04-02 847-809 not yet reported which blocks → T-MOBILE USA, INC. 6529 BARRINGTON IL
2001-03-09 847-708 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
2001-02-20 847-219 not yet reported which blocks → T-MOBILE USA, INC. 6529 LAKEFOREST IL
2001-02-20 847-312 not yet reported which blocks → T-MOBILE USA, INC. 6529 ELK GROVE IL
2001-02-20 847-630 not yet reported which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2001-02-20 847-668 not yet reported which blocks → T-MOBILE USA, INC. 6529 LIBERTYVL IL
— 847-275 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-293 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-322 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-331 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-338 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-343 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-344 not yet reported which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 847-361 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-372 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-401 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-409 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-414 not yet reported which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-417 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-452 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
— 847-456 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-477 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-489 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ELK GROVE IL
— 847-505 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 WAUKEGAN IL
— 847-514 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-529 0XXX1XXX2XXX which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-530 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-571 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-652 9XXX which blocks → T-MOBILE USA, INC. 6529 ELK GROVE IL
— 847-722 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-754 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
— 847-757 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-769 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-774 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-791 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-800 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-812 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ELK GROVE IL
— 847-833 not yet reported which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 847-845 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-858 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-863 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-877 not yet reported which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-878 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-903 none assigned yet which blocks → T-MOBILE USA, INC. 6529 NORTHBROOK IL
— 847-907 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 PALATINE IL

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.