NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 618
NEW CINGULAR WIRELESS PCS, LLC - IL 2
EXIANT COMMUNICATIONS LLC 2
AHOI 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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2016-05-16 618-491-6XXX 6000–6999Assigned ONVOY, LLC 224C COLLINSVL IL
2016-05-16 618-491-7XXX 7000–7999Assigned ONVOY, LLC 224C COLLINSVL IL
2016-05-16 618-491-8XXX 8000–8999Assigned ONVOY, LLC 224C COLLINSVL IL
2016-05-09 618-517-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OLNEY IL
2016-05-04 618-726-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 O FALLON IL
2016-04-28 618-300-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CARBONDALE IL
2016-04-19 618-800-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 EDWARDSVL IL
2016-03-29 618-942-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HERRIN IL
2016-03-25 618-852-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWTON IL
2016-03-24 618-754-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUNDAS IL
2016-03-23 618-816-8XXX 8000–8999Assigned ONVOY, LLC 224C MT VERNON IL
2016-03-23 618-816-9XXX 9000–9999Assigned ONVOY, LLC 224C MT VERNON IL
2016-03-21 618-421-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROBINSON IL
2016-03-21 618-464-3XXX 3000–3999Assigned ONVOY, LLC 224C NASHVILLE IL
2016-03-21 618-464-4XXX 4000–4999Assigned ONVOY, LLC 224C NASHVILLE IL
2016-03-21 618-944-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MARION IL
2016-03-21 618-964-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MARION IL
2016-03-18 618-744-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELLEVILLE IL
2016-03-17 618-600-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANITE CY IL
2016-03-16 618-431-7XXX 7000–7999Assigned ONVOY, LLC 224C VANDALIA IL
2016-03-16 618-431-8XXX 8000–8999Assigned ONVOY, LLC 224C VANDALIA IL
2016-03-16 618-471-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WOOD RIVER IL
2016-03-08 618-408-0XXX 0000–0999Assigned ONVOY, LLC 224C BECKEMEYER IL
2016-03-08 618-408-1XXX 1000–1999Assigned ONVOY, LLC 224C BECKEMEYER IL
2016-03-07 618-221-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 BREESE IL
2016-03-07 618-702-3XXX 3000–3999Assigned ONVOY, LLC 224C LEBANON IL
2016-03-07 618-702-4XXX 4000–4999Assigned ONVOY, LLC 224C LEBANON IL
2016-03-04 618-693-1XXX 1000–1999Assigned ONVOY, LLC 224C BETHALTO IL
2016-03-04 618-693-2XXX 2000–2999Assigned ONVOY, LLC 224C BETHALTO IL
2016-03-03 618-479-3XXX 3000–3999Assigned ONVOY, LLC 224C SALEM IL
2016-03-03 618-481-1XXX 1000–1999Assigned ONVOY, LLC 224C BRIGHTON IL
2016-03-03 618-481-2XXX 2000–2999Assigned ONVOY, LLC 224C BRIGHTON IL
2016-03-03 618-516-5XXX 5000–5999Assigned NUSO, LLC 478J FAIRFIELD IL
2016-03-03 618-723-5XXX 5000–5999Assigned NUSO, LLC 478J NOBLE IL
2016-03-03 618-740-2XXX 2000–2999Assigned ONVOY, LLC 224C SALEM IL
2016-03-03 618-895-5XXX 5000–5999Assigned NUSO, LLC 478J WAYNE CITY IL
2016-03-02 618-230-2XXX 2000–2999Assigned ONVOY, LLC 224C EDGEMONT IL
2016-03-02 618-230-3XXX 3000–3999Assigned ONVOY, LLC 224C EDGEMONT IL
2016-03-02 618-471-2XXX 2000–2999Assigned ONVOY, LLC 224C WOOD RIVER IL
2016-03-02 618-471-4XXX 4000–4999Assigned ONVOY, LLC 224C WOOD RIVER IL
2016-03-01 618-414-3XXX 3000–3999Assigned ONVOY, LLC 224C TROY IL
2016-03-01 618-414-4XXX 4000–4999Assigned ONVOY, LLC 224C TROY IL
2016-03-01 618-509-7XXX 7000–7999Assigned METROPCS, INC. 5562 BELLEVILLE IL
2016-03-01 618-515-1XXX 1000–1999Assigned ONVOY, LLC 224C E ST LOUIS IL
2016-03-01 618-515-2XXX 2000–2999Assigned ONVOY, LLC 224C E ST LOUIS IL
2016-03-01 618-619-0XXX 0000–0999Assigned ONVOY, LLC 224C ALTON IL
2016-03-01 618-619-1XXX 1000–1999Assigned ONVOY, LLC 224C ALTON IL
2016-03-01 618-744-4XXX 4000–4999Assigned METROPCS, INC. 5562 BELLEVILLE IL
2016-02-29 618-607-6XXX 6000–6999Assigned ONVOY, LLC 224C O FALLON IL
2016-02-29 618-607-8XXX 8000–8999Assigned ONVOY, LLC 224C O FALLON IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.