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
2011-09-19 618-523-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C GERMANTOWN IL
2011-09-19 618-526-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C BREESE IL
2011-09-19 618-710-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FREEBURG IL
2011-09-19 618-808-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LEBANON IL
2011-09-19 618-844-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CARLYLE IL
2011-09-19 618-918-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CENTRALIA IL
2011-09-15 618-225-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANITE CY IL
2011-08-31 618-240-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 MT CARMEL IL
2011-08-29 618-381-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 COLLINSVL IL
2011-08-25 618-509-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELLEVILLE IL
2011-08-22 618-246-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 MT VERNON IL
2011-08-08 618-219-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GRANITE CY IL
2011-07-25 618-855-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2011-07-25 618-855-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2011-07-25 618-855-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2011-07-20 618-340-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RED BUD IL
2011-07-20 618-708-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPARTA IL
2011-07-08 618-671-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVILLE IL
2011-07-08 618-671-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVILLE IL
2011-06-24 618-509-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 BELLEVILLE IL
2011-06-15 618-823-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANITE CY IL
2011-06-10 618-416-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C BELLEVILLE IL
2011-06-09 618-200-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 BENTON IL
2011-05-27 618-302-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ALBION IL
2011-05-25 618-230-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 EDGEMONT IL
2011-04-29 618-691-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2011-04-29 618-691-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2011-04-29 618-691-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2011-04-22 618-240-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MT CARMEL IL
2011-04-20 618-641-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVILLE IL
2011-04-19 618-505-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TROY IL
2011-04-14 618-255-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C WOOD RIVER IL
2011-04-14 618-372-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C BRIGHTON IL
2011-04-14 618-479-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SALEM IL
2011-04-14 618-547-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C KINMUNDY IL
2011-04-14 618-650-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C EDWARDSVL IL
2011-04-14 618-690-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GREENVILLE IL
2011-04-14 618-717-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C BETHALTO IL
2011-04-14 618-823-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GRANITE CY IL
2011-04-14 618-887-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MARINE IL
2011-04-12 618-343-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 COLLINSVL IL
2011-04-12 618-514-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 COLLINSVL IL
2011-04-12 618-514-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 COLLINSVL IL
2011-04-11 618-519-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CARBONDALE IL
2011-04-08 618-944-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARION IL
2011-03-25 618-200-8XXX 8000–8999Assigned ONVOY, LLC 224C BENTON IL
2011-03-25 618-944-8XXX 8000–8999Assigned ONVOY, LLC 224C MARION IL
2011-03-04 618-408-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BECKEMEYER IL
2011-02-21 618-696-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2011-02-21 618-696-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COLLINSVL 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.