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 708
T-MOBILE USA, INC. 122
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
2011-05-02 708-800 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-03-31 708-200 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-03-25 708-600 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-03-16 708-238 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2010-10-05 708-501 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2010-07-20 708-252 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2009-02-24 708-965 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2009-02-11 708-942 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2008-10-06 708-328 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2008-08-12 708-374 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2008-05-19 708-928 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2008-03-19 708-953 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2007-10-11 708-890 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2007-07-10 708-674 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2007-07-06 708-595 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2007-03-28 708-262 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2007-02-20 708-527 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2007-01-24 708-548 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2006-09-19 708-663 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2006-09-08 708-979 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2006-06-23 708-949 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2006-06-21 708-407 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2006-06-06 708-543 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2005-11-21 708-620 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2005-09-28 708-833 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2005-04-22 708-969 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2003-03-05 708-299 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2002-10-16 708-691 5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2002-06-10 708-743 none assigned yet which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2002-05-21 708-699 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2002-03-13 708-717 7XXX which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2002-02-13 708-769 not yet reported which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2002-02-11 708-307 7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2002-02-11 708-439 5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2001-11-15 708-932 none assigned yet which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2001-05-22 708-935 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BLUEISLAND IL
2001-04-02 708-351 not yet reported which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2001-04-02 708-945 not yet reported which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2001-03-15 708-724 0XXX1XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2001-02-12 708-289 not yet reported which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
— 708-243 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 708-250 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 708-257 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 708-259 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BLUEISLAND IL
— 708-261 0XXX which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 708-268 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 708-275 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 708-288 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 708-296 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
— 708-359 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL

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.