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 203
ONVOY, LLC - CT 5
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
2007-10-15 203-516-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ANSONIDRBY CT
2007-10-15 203-706-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2007-10-10 203-301-4XXX 4000–4999Assigned CSC VOICE, LLC 612K MILFORD CT
2007-10-10 203-873-0XXX 0000–0999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2007-09-26 203-207-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2007-09-26 203-216-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTPORT CT
2007-09-26 203-278-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2007-09-26 203-291-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTPORT CT
2007-09-26 203-297-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2007-09-26 203-446-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2007-09-26 203-516-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2007-09-14 203-309-7XXX 7000–7999Assigned METROPCS, INC. 5562 DARIEN CT
2007-09-14 203-309-8XXX 8000–8999Assigned METROPCS, INC. 5562 DARIEN CT
2007-09-14 203-309-9XXX 9000–9999Assigned METROPCS, INC. 5562 DARIEN CT
2007-09-14 203-405-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WOODBURY CT
2007-09-10 203-286-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NORWALK CT
2007-09-10 203-392-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2007-09-10 203-551-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2007-09-05 203-745-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2007-09-04 203-424-7XXX 7000–7999Assigned METROPCS, INC. 5562 DARIEN CT
2007-09-04 203-424-8XXX 8000–8999Assigned METROPCS, INC. 5562 DARIEN CT
2007-09-04 203-424-9XXX 9000–9999Assigned METROPCS, INC. 5562 DARIEN CT
2007-09-04 203-617-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2007-09-04 203-617-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2007-08-27 203-443-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MERIDEN CT
2007-08-24 203-286-6XXX 6000–6999Assigned CSC VOICE, LLC 612K NORWALK CT
2007-08-24 203-286-7XXX 7000–7999Assigned CSC VOICE, LLC 612K NORWALK CT
2007-08-24 203-286-8XXX 8000–8999Assigned CSC VOICE, LLC 612K NORWALK CT
2007-08-24 203-504-2XXX 2000–2999Assigned CSC VOICE, LLC 612K STAMFORD CT
2007-08-24 203-504-8XXX 8000–8999Assigned CSC VOICE, LLC 612K STAMFORD CT
2007-08-14 203-297-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2007-08-14 203-428-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2007-08-14 203-821-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2007-08-10 203-304-8XXX 8000–8999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEWTOWN CT
2007-08-10 203-350-5XXX 5000–5999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 MADISON CT
2007-08-10 203-403-5XXX 5000–5999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 RIDGEFIELD CT
2007-08-10 203-424-5XXX 5000–5999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 DARIEN CT
2007-08-10 203-457-7XXX 7000–7999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 GUILFORD CT
2007-08-10 203-563-4XXX 4000–4999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 WILTON CT
2007-08-10 203-594-2XXX 2000–2999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NEW CANAAN CT
2007-08-10 203-714-7XXX 7000–7999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 NAUGATUCK CT
2007-08-09 203-528-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WATERBURY CT
2007-08-09 203-528-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WATERBURY CT
2007-08-08 203-505-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2007-08-08 203-505-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2007-08-08 203-868-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2007-08-08 203-885-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2007-08-08 203-993-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2007-08-03 203-423-1XXX 1000–1999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 WILTON CT
2007-07-25 203-538-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J HUNTINGTON CT

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.