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 773
ONVOY, 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
2005-11-30 773-892-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2005-11-30 773-892-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2005-11-30 773-892-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2005-11-30 773-892-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2005-11-30 773-892-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2005-11-28 773-299-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2005-11-16 773-645-6XXX 6000–6999Assigned FIRST COMMUNICATIONS, LLC 460K CHICGOZN04 IL
2005-11-15 773-724-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHICGOZN03 IL
2005-11-15 773-724-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHICGOZN03 IL
2005-11-15 773-724-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHICGOZN03 IL
2005-11-14 773-641-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-11-14 773-641-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-11-14 773-641-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-11-14 773-641-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-11-14 773-641-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-11-14 773-641-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-11-14 773-641-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-11-11 773-467-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN03 IL
2005-11-11 773-569-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHICGOZN03 IL
2005-11-11 773-867-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J CHICGOZN03 IL
2005-11-04 773-299-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2005-11-01 773-827-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2005-10-25 773-563-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2005-10-25 773-563-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2005-10-25 773-563-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2005-10-25 773-563-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2005-10-25 773-563-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2005-10-25 773-563-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2005-10-25 773-563-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2005-10-25 773-563-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2005-10-25 773-563-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2005-10-25 773-563-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2005-10-21 773-250-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2005-10-18 773-682-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-18 773-682-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-18 773-682-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-18 773-682-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-18 773-682-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-18 773-682-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-18 773-682-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-18 773-682-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-18 773-682-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-18 773-682-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-18 773-724-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-18 773-724-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2005-10-12 773-621-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN03 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.