NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 617
BANDWIDTH.COM CLEC, LLC - MA 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
2018-01-09 617-685-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CAMBRIDGE MA
2017-12-29 617-404-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D QUINCY MA
2017-12-11 617-639-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-12-11 617-687-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-12-11 617-687-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-12-11 617-689-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-12-11 617-691-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-12-11 617-691-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-12-11 617-691-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-11-08 617-801-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-11-08 617-845-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-11-08 617-845-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-11-08 617-890-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-11-08 617-934-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-10-02 617-706-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-10-02 617-706-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-09-08 617-336-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D CHELSEA MA
2017-08-01 617-340-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D NEWTON MA
2017-08-01 617-702-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SOMERVILLE MA
2017-07-21 617-405-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J QUINCY MA
2017-07-18 617-203-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EVERETT MA
2017-07-17 617-302-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-07-17 617-302-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-07-17 617-405-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-07-05 617-691-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J QUINCY MA
2017-06-26 617-405-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-06-15 617-663-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J NEWTON MA
2017-06-12 617-334-1XXX 1000–1999Assigned IP HORIZON LLC 515J SO BOSTON MA
2017-06-12 617-829-8XXX 8000–8999Assigned IP HORIZON LLC 515J QUINCY MA
2017-06-08 617-545-1XXX 1000–1999Assigned IP HORIZON LLC 515J EVERETT MA
2017-06-08 617-716-7XXX 7000–7999Assigned IP HORIZON LLC 515J EASTBOSTON MA
2017-06-01 617-890-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J QUINCY MA
2017-04-28 617-249-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D QUINCY MA
2017-04-28 617-618-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D NEWTON MA
2017-04-28 617-752-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D SO BOSTON MA
2017-04-27 617-209-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BELMONT MA
2017-04-24 617-691-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2017-04-17 617-843-6XXX 6000–6999Assigned TELNYX LLC 073H EVERETT MA
2017-04-17 617-993-9XXX 9000–9999Assigned TELNYX LLC 073H BELMONT MA
2017-04-14 617-752-0XXX 0000–0999Assigned TELNYX LLC 073H SO BOSTON MA
2017-04-12 617-440-9XXX 9000–9999Assigned TELNYX LLC 073H SOMERVILLE MA
2017-04-07 617-716-8XXX 8000–8999Assigned TELNYX LLC 073H EASTBOSTON MA
2017-04-03 617-507-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-03-17 617-616-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SOMERVILLE MA
2017-03-15 617-545-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J EVERETT MA
2017-03-15 617-752-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SO BOSTON MA
2017-03-01 617-691-5XXX 5000–5999Assigned TELNYX LLC 073H QUINCY MA
2017-02-28 617-582-2XXX 2000–2999Assigned TELNYX LLC 073H BROOKLINE MA
2017-02-28 617-665-6XXX 6000–6999Assigned TELNYX LLC 073H CAMBRIDGE MA
2017-02-28 617-928-8XXX 8000–8999Assigned TELNYX LLC 073H NEWTON MA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.