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
2016-02-25 618-352-5XXX 5000–5999Assigned ONVOY, LLC 224C CENTRALIA IL
2016-02-25 618-352-7XXX 7000–7999Assigned ONVOY, LLC 224C CENTRALIA IL
2016-02-22 618-212-8XXX 8000–8999Assigned ONVOY, LLC 224C BELLEVILLE IL
2016-02-22 618-767-9XXX 9000–9999Assigned ONVOY, LLC 224C BELLEVILLE IL
2016-02-17 618-205-9XXX 9000–9999Assigned ONVOY, LLC 224C GLENCARBON IL
2016-02-17 618-391-9XXX 9000–9999Assigned ONVOY, LLC 224C GLENCARBON IL
2016-02-15 618-403-5XXX 5000–5999Assigned NUSO, LLC 478J FLORA IL
2016-02-10 618-703-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 GREENVILLE IL
2016-01-29 618-600-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANITE CY IL
2016-01-29 618-600-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANITE CY IL
2016-01-27 618-320-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 OLNEY IL
2016-01-25 618-538-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WESTVIEW IL
2016-01-25 618-751-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 MARION IL
2016-01-13 618-706-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BATCHTOWN IL
2016-01-12 618-238-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J EDGEWOOD IL
2016-01-12 618-347-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SEFTON IL
2016-01-12 618-349-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ST PETER IL
2016-01-12 618-424-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ADDIEVILLE IL
2016-01-12 618-437-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 INA IL
2016-01-12 618-478-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NEW MINDEN IL
2016-01-12 618-487-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BEECHER CY IL
2016-01-12 618-619-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ALTON IL
2016-01-12 618-787-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DUBOIS IL
2016-01-08 618-469-5XXX 5000–5999Assigned FRONTIER NORTH, INC. - IL 1015 ROBINSON IL
2016-01-08 618-469-6XXX 6000–6999Assigned FRONTIER NORTH, INC. - IL 1015 ROBINSON IL
2016-01-07 618-707-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 LAWRENCEVL IL
2016-01-06 618-767-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVILLE IL
2016-01-06 618-767-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVILLE IL
2015-12-30 618-302-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 ALBION IL
2015-12-30 618-703-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GREENVILLE IL
2015-12-30 618-800-1XXX 1000–1999Assigned ONVOY, LLC 224C EDWARDSVL IL
2015-12-29 618-666-0XXX 0000–0999Assigned ONVOY, LLC 224C COLLINSVL IL
2015-12-28 618-313-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 RIDGWAY IL
2015-12-28 618-571-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 PINCKNEYVL IL
2015-12-28 618-600-8XXX 8000–8999Assigned ONVOY, LLC 224C GRANITE CY IL
2015-12-23 618-707-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 LAWRENCEVL IL
2015-12-21 618-226-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SHATTUC IL
2015-12-21 618-247-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SANDOVAL IL
2015-12-21 618-390-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WOODLAWN IL
2015-12-21 618-461-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ST ELMO IL
2015-12-21 618-762-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WALTONVL IL
2015-12-21 618-836-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SHIPMAN IL
2015-12-21 618-934-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SUMMERFLD IL
2015-12-18 618-249-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J IRVINGTON IL
2015-12-18 618-326-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MULBRY GRV IL
2015-12-18 618-370-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MEDORA IL
2015-12-18 618-400-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MILLSTADT IL
2015-12-18 618-425-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PITTSBURG IL
2015-12-18 618-432-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PATOKA IL
2015-12-18 618-493-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HOYLETON 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.