NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 781
COMCAST IP PHONE, LLC 166
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
2025-10-10 781-777-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J ARLINGTON MA
2023-07-05 781-992-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J WELLESLEY MA
2023-07-05 781-992-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WELLESLEY MA
2023-07-05 781-992-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WELLESLEY MA
2023-07-05 781-992-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WELLESLEY MA
2023-06-15 781-456-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LEXINGTON MA
2023-06-15 781-456-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LEXINGTON MA
2023-06-15 781-456-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LEXINGTON MA
2023-06-15 781-456-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LEXINGTON MA
2023-06-09 781-576-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MARBLEHEAD MA
2023-06-09 781-576-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J MARBLEHEAD MA
2023-04-06 781-328-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BURLINGTON MA
2023-04-06 781-328-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BURLINGTON MA
2023-04-06 781-359-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BURLINGTON MA
2023-04-04 781-417-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SAUGUS MA
2023-04-04 781-520-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SAUGUS MA
2023-04-03 781-378-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SCITUATE MA
2023-04-03 781-470-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J SCITUATE MA
2023-03-15 781-429-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J NEEDHAM MA
2023-01-20 781-242-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HULL MA
2022-09-27 781-759-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WOBURN MA
2022-09-27 781-759-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WOBURN MA
2022-09-12 781-887-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HANOVER MA
2022-06-28 781-677-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J READING MA
2021-08-18 781-374-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HINGHAM MA
2021-08-18 781-374-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HINGHAM MA
2021-08-18 781-615-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J CANTON MA
2021-08-18 781-615-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CANTON MA
2021-08-17 781-753-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J ROCKLAND MA
2021-08-17 781-753-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J ROCKLAND MA
2021-08-04 781-413-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WEYMOUTH MA
2021-08-04 781-803-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WEYMOUTH MA
2019-10-03 781-579-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BRAINTREE MA
2019-10-03 781-882-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MARSHFIELD MA
2019-08-26 781-385-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HINGHAM MA
2019-08-06 781-918-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LEXINGTON MA
2019-06-05 781-702-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J NORWOOD MA
2019-06-05 781-747-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DEDHAM MA
2019-06-05 781-807-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J RANDOLPH MA
2019-06-05 781-914-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WAKEFIELD MA
2018-11-30 781-497-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WOBURN MA
2018-08-30 781-675-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J NEEDHAM MA
2018-05-09 781-918-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LEXINGTON MA
2018-04-11 781-660-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WEYMOUTH MA
2018-01-08 781-825-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BURLINGTON MA
2017-11-15 781-918-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LEXINGTON MA
2017-11-07 781-404-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WOBURN MA
2016-10-14 781-380-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BRAINTREE MA
2016-06-23 781-660-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WEYMOUTH MA
2016-03-18 781-701-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WALTHAM 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.