NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 857
BANDWIDTH.COM CLEC, LLC - MA 1
AHOI 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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2017-04-12 857-773-0XXX 0000–0999Assigned TELNYX LLC 073H JAMAICA PL MA
2017-04-10 857-410-2XXX 2000–2999Assigned TELNYX LLC 073H CHARLESTN MA
2017-04-10 857-663-3XXX 3000–3999Assigned TELNYX LLC 073H DORCHESTER MA
2017-04-07 857-414-1XXX 1000–1999Assigned TELNYX LLC 073H BRIGHTON MA
2017-04-04 857-971-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2017-03-15 857-361-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BROOKLINE MA
2017-03-15 857-386-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHELSEA MA
2017-03-15 857-410-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHARLESTN MA
2017-03-15 857-703-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HYDE PARK MA
2017-03-13 857-378-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BOSTON MA
2017-03-10 857-378-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2017-03-01 857-287-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2017-03-01 857-287-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2017-03-01 857-424-1XXX 1000–1999Assigned TELNYX LLC 073H ROXBURY MA
2017-02-28 857-895-5XXX 5000–5999Assigned TELNYX LLC 073H BOSTON MA
2017-02-06 857-287-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-02-06 857-378-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-02-06 857-378-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-02-06 857-378-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-02-06 857-378-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-02-06 857-378-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-02-06 857-378-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-02-06 857-895-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-02-06 857-895-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-02-06 857-895-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-02-03 857-895-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2017-02-03 857-895-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2017-02-02 857-378-5XXX 5000–5999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2017-02-01 857-287-0XXX 0000–0999Assigned METROPCS, INC. 5562 BOSTON MA
2017-02-01 857-287-4XXX 4000–4999Assigned METROPCS, INC. 5562 BOSTON MA
2017-02-01 857-287-5XXX 5000–5999Assigned METROPCS, INC. 5562 BOSTON MA
2017-02-01 857-287-6XXX 6000–6999Assigned METROPCS, INC. 5562 BOSTON MA
2017-02-01 857-287-7XXX 7000–7999Assigned METROPCS, INC. 5562 BOSTON MA
2017-02-01 857-287-8XXX 8000–8999Assigned METROPCS, INC. 5562 BOSTON MA
2017-02-01 857-287-9XXX 9000–9999Assigned METROPCS, INC. 5562 BOSTON MA
2017-01-24 857-393-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-01-24 857-393-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-01-24 857-393-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-01-24 857-393-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-01-24 857-393-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-01-24 857-393-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-01-24 857-393-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-01-24 857-393-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-01-24 857-393-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-01-19 857-505-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2017-01-11 857-505-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D BOSTON MA
2016-12-06 857-409-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2016-12-01 857-505-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2016-10-27 857-424-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROXBURY MA
2016-10-27 857-424-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROXBURY MA

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.