NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 312
BANDWIDTH.COM CLEC, LLC - IL 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
2012-08-10 312-600-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN01 IL
2012-08-08 312-605-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CHICGOZN01 IL
2012-08-08 312-605-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J CHICGOZN01 IL
2012-08-08 312-605-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J CHICGOZN01 IL
2012-08-08 312-610-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-07-18 312-600-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2012-07-18 312-600-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2012-07-10 312-219-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN01 IL
2012-07-10 312-219-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN01 IL
2012-07-03 312-219-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 CHICGOZN01 IL
2012-06-21 312-561-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-06-18 312-292-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-06-18 312-292-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-06-11 312-219-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J CHICGOZN01 IL
2012-05-25 312-219-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN01 IL
2012-05-25 312-219-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN01 IL
2012-05-25 312-219-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN01 IL
2012-05-25 312-219-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN01 IL
2012-05-24 312-273-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-05-24 312-508-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-05-24 312-508-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-05-24 312-508-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-05-24 312-508-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN01 IL
2012-05-24 312-508-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN01 IL
2012-05-24 312-508-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-05-24 312-508-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-05-17 312-508-7XXX 7000–7999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L CHICGOZN01 IL
2012-05-16 312-257-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-05-16 312-257-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-05-14 312-257-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-05-14 312-257-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-05-14 312-257-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-05-10 312-257-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-05-10 312-257-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-05-10 312-465-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-05-10 312-465-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-05-04 312-216-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J CHICGOZN01 IL
2012-05-04 312-509-6XXX 6000–6999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2012-05-04 312-509-7XXX 7000–7999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2012-05-04 312-509-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2012-05-04 312-509-9XXX 9000–9999Assigned ONVOY, LLC 224C CHICGOZN01 IL
2012-04-27 312-465-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J CHICGOZN01 IL
2012-04-24 312-448-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-04-24 312-448-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-04-24 312-459-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-04-24 312-459-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN01 IL
2012-04-05 312-509-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-04-05 312-509-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-04-05 312-509-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL
2012-04-05 312-509-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN01 IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.