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
2013-09-19 857-208-7XXX 7000–7999Assigned IP HORIZON LLC 515J BOSTON MA
2013-09-18 857-256-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J EASTBOSTON MA
2013-09-16 857-242-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2013-09-11 857-206-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-09-11 857-214-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-09-11 857-268-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-09-11 857-268-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-09-11 857-300-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-09-11 857-300-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-09-11 857-317-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-09-11 857-317-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-09-11 857-498-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2013-09-11 857-498-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2013-09-11 857-500-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
2013-09-11 857-559-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2013-09-11 857-576-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2013-09-11 857-576-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2013-09-11 857-777-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
2013-09-11 857-777-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
2013-09-09 857-271-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DORCHESTER MA
2013-09-04 857-268-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2013-09-03 857-202-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2013-09-03 857-202-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2013-08-28 857-323-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHELSEA MA
2013-08-21 857-999-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D CAMBRIDGE MA
2013-08-19 857-269-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2013-08-19 857-269-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2013-08-19 857-452-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2013-08-15 857-214-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D BOSTON MA
2013-08-15 857-214-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D BOSTON MA
2013-08-15 857-214-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D BOSTON MA
2013-08-15 857-214-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BOSTON MA
2013-08-15 857-214-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D BOSTON MA
2013-08-15 857-214-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D BOSTON MA
2013-08-15 857-273-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J JAMAICA PL MA
2013-08-15 857-496-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SO BOSTON MA
2013-08-05 857-500-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2013-07-31 857-267-0XXX 0000–0999Assigned METROPCS, INC. 5562 MILTON MA
2013-07-29 857-500-8XXX 8000–8999Assigned IP HORIZON LLC 515J CAMBRIDGE MA
2013-07-19 857-305-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2013-07-17 857-267-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MILTON MA
2013-07-10 857-218-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2013-07-10 857-218-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2013-07-05 857-415-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D BOSTON MA
2013-07-03 857-214-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2013-06-20 857-939-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2013-06-10 857-496-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SO BOSTON MA
2013-06-05 857-285-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
2013-06-05 857-285-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
2013-06-05 857-342-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E HYDE PARK 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.