NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

25 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 475
ONVOY, LLC - CT 17
BANDWIDTH.COM CLEC, LLC - CT 4
CSC WIRELESS, LLC 3
OMNIPOINT COMMUNICATIONS, INC. - CT 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
2015-09-04 475-220-8XXX 8000–8999Assigned PAETEC COMMUNICATIONS, LLC - CT 3083 NEW HAVEN CT
2015-09-04 475-220-9XXX 9000–9999Assigned PAETEC COMMUNICATIONS, LLC - CT 3083 NEW HAVEN CT
2015-09-04 475-419-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2015-09-04 475-419-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2015-09-04 475-434-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2015-09-04 475-988-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2015-09-04 475-988-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2015-09-02 475-897-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 GREENWICH CT
2015-08-12 475-218-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2015-08-12 475-218-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2015-08-12 475-225-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2015-08-11 475-731-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2015-08-11 475-731-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2015-08-05 475-439-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2015-08-04 475-209-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2015-08-04 475-434-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2015-07-31 475-269-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HUNTINGTON CT
2015-07-31 475-619-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 STAMFORD CT
2015-07-31 475-689-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2015-07-31 475-689-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2015-07-31 475-777-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANSONIDRBY CT
2015-07-30 475-323-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWTOWN CT
2015-07-30 475-419-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2015-07-30 475-419-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2015-07-30 475-747-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2015-07-30 475-747-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2015-07-24 475-206-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2015-07-24 475-209-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2015-07-24 475-266-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NORWALK CT
2015-07-23 475-655-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2015-07-22 475-206-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J DANBURY CT
2015-07-01 475-419-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2015-07-01 475-419-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2015-07-01 475-419-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2015-06-29 475-747-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2015-06-29 475-747-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2015-06-29 475-747-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2015-06-26 475-343-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J MERIDEN CT
2015-06-26 475-619-5XXX 5000–5999Assigned CSC VOICE, LLC 612K STAMFORD CT
2015-06-24 475-239-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 TRUMBULL CT
2015-06-24 475-266-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NORWALK CT
2015-06-24 475-655-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2015-06-24 475-655-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2015-06-23 475-689-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2015-06-23 475-689-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2015-06-19 475-213-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2015-06-19 475-213-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2015-06-19 475-213-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2015-06-19 475-213-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2015-06-19 475-747-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK 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.