NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 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, last 30 days — NPA 708
ONVOY, LLC 1
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
2017-07-21 708-438 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 BLUEISLAND IL
2017-03-31 708-722 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2016-12-13 708-840 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2016-11-10 708-690 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLUEISLAND IL
2016-09-13 708-852 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2016-09-13 708-875 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2016-07-13 708-882 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2016-04-27 708-835 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2016-03-17 708-677 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2016-03-15 708-879 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C SUMMIT IL
2016-03-07 708-892 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC 224C CRETE IL
2016-02-29 708-419 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC 224C CALUMET CY IL
2015-10-08 708-894 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2015-10-07 708-640 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2015-09-25 708-964 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2015-09-16 708-968 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 LA GRANGE IL
2015-09-04 708-270 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLUEISLAND IL
2015-08-17 708-616 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2015-07-28 708-967 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J CHICGOZN03 IL
2015-06-26 708-573 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2015-06-25 708-517 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2015-06-12 708-578 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2015-03-10 708-981 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2015-01-28 708-986 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BLUEISLAND IL
2014-12-29 708-982 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 CICERO IL
2014-12-16 708-682 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BLUEISLAND IL
2014-12-01 708-866 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C LA GRANGE IL
2014-10-24 708-963 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2014-09-12 708-972 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLUEISLAND IL
2014-09-11 708-980 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2014-03-17 708-940 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2013-12-03 708-973 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2013-12-03 708-996 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2013-10-24 708-998 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2013-10-16 708-971 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2013-10-07 708-916 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2013-09-05 708-737 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ORLAND IL
2013-08-22 708-884 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 BELLWOOD IL
2013-08-16 708-858 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E LANSING IL
2013-07-11 708-904 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2013-06-13 708-506 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2013-06-13 708-580 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 TINLEYPARK IL
2013-06-07 708-627 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MONEE IL
2013-05-09 708-831 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN03 IL
2013-05-01 708-830 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2013-04-18 708-571 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2013-04-18 708-673 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2013-04-10 708-719 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E MOKENA IL
2013-04-10 708-803 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E OAK FOR SO IL
2013-04-09 708-864 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E TINLEYPARK 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.