NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2005-11-29 618-540-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2005-11-29 618-540-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2005-11-29 618-540-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2005-11-29 618-540-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2005-11-23 618-216-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WOOD RIVER IL
2005-11-23 618-436-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CENTRALIA IL
2005-11-16 618-315-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT VERNON IL
2005-11-11 618-207-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVILLE IL
2005-10-05 618-638-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 METROPOLIS IL
2005-09-30 618-433-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ALTON IL
2005-09-29 618-223-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 COLLINSVL IL
2005-09-29 618-223-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 COLLINSVL IL
2005-09-16 618-516-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FAIRFIELD IL
2005-09-16 618-790-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DU QUOIN IL
2005-09-13 618-204-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MT VERNON IL
2005-09-07 618-365-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C COLLINSVL IL
2005-09-07 618-374-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C ALTON IL
2005-08-31 618-710-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FREEBURG IL
2005-08-29 618-248-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ALBERS IL
2005-08-29 618-566-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MASCOUTAH IL
2005-08-29 618-588-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K NEW BADEN IL
2005-08-29 618-934-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SUMMERFLD IL
2005-08-25 618-708-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SPARTA IL
2005-08-25 618-882-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HIGHLAND IL
2005-08-22 618-315-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT VERNON IL
2005-08-15 618-310-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BELLEVILLE IL
2005-08-15 618-615-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHESTER IL
2005-08-15 618-709-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GRANITE CY IL
2005-08-02 618-223-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2005-08-01 618-316-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 MT VERNON IL
2005-08-01 618-694-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 MARION IL
2005-07-27 618-207-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVILLE IL
2005-07-27 618-783-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWTON IL
2005-07-27 618-783-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWTON IL
2005-07-18 618-205-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GLENCARBON IL
2005-07-06 618-710-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FREEBURG IL
2005-07-06 618-808-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LEBANON IL
2005-07-01 618-318-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 PINCKNEYVL IL
2005-06-22 618-505-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 TROY IL
2005-06-20 618-494-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 JERSEYVL IL
2005-06-09 618-206-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K O FALLON IL
2005-06-09 618-213-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K EDGEMONT IL
2005-06-09 618-215-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K E ST LOUIS IL
2005-06-01 618-717-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BETHALTO IL
2005-06-01 618-717-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BETHALTO IL
2005-05-13 618-215-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 E ST LOUIS IL
2005-05-13 618-215-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 E ST LOUIS IL
2005-05-09 618-206-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J O FALLON IL
2005-04-27 618-223-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COLLINSVL IL
2005-04-27 618-772-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLLINSVL IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.