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
2012-12-20 708-631 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J BLUEISLAND IL
2012-11-19 708-520 0–9 XXXwhole prefix which blocks → ILLINOIS BELL TEL CO 9329 OAK LAWN IL
2012-11-14 708-607 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PEOTONE IL
2012-10-30 708-315 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LA GRANGE IL
2012-10-19 708-603 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 LA GRANGE IL
2012-04-23 708-314 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2012-04-05 708-300 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 CHICAGOHTS IL
2012-01-18 708-541 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLUEISLAND IL
2012-01-13 708-518 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2011-12-16 708-304 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J CRETE IL
2011-11-08 708-509 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-11-08 708-559 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-10-12 708-208 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-10-12 708-504 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-10-04 708-666 0–9 XXXall 10 · 6 holders which blocks → CLEAR RATE COMMUNICATIONS, LLC 046L OAK PARK IL
2011-10-03 708-340 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LA GRANGE IL
2011-08-11 708-295 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SUMMIT IL
2011-07-27 708-545 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-07-25 708-265 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2011-07-19 708-530 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-06-30 708-759 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-06-15 708-264 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-06-13 708-537 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-05-27 708-247 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E LA GRANGE IL
2011-05-18 708-495 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 LA GRANGE IL
2011-05-02 708-368 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-05-02 708-378 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
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
2011-02-09 708-400 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICAGOHTS IL
2010-10-05 708-501 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HARVEY IL
2010-08-10 708-465 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO IL
2010-08-03 708-888 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E RIVERDALE IL
2010-07-20 708-252 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2010-03-11 708-515 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICAGOHTS IL
2009-11-24 708-584 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C BEECHER IL
2009-07-01 708-232 0–9 XXXall 10 · 5 holders which blocks → ILLINOIS BELL TEL CO 9329 HARVEY IL
2009-05-06 708-654 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICAGOHTS IL
2009-04-21 708-941 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OAK FOR SO 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
2008-10-17 708-244 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2008-10-17 708-510 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICAGOHTS IL
2008-10-17 708-513 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICAGOHTS IL
2008-10-15 708-770 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ORLAND IL
2008-10-15 708-778 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ORLAND IL
2008-10-15 708-789 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ORLAND IL
2008-10-08 708-357 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C LA GRANGE 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.