NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 603
COMCAST IP PHONE, LLC 242
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
2025-09-17 603-813-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CTRBARNSTE NH
2025-09-10 603-701-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J NEW DURHAM NH
2025-09-03 603-280-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BARRINGTON NH
2025-09-03 603-460-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DEERFIELD NH
2025-07-01 603-755-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J FARMINGTON NH
2025-07-01 603-941-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WOLFEBORO NH
2023-06-16 603-698-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2023-06-16 603-698-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2023-06-16 603-699-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NASHUA NH
2023-06-16 603-699-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J NASHUA NH
2023-06-16 603-790-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J W LEBANON NH
2023-03-24 603-877-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J NEW LONDON NH
2023-02-14 603-708-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CANTERBURY NH
2023-01-30 603-633-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MILFORD NH
2023-01-30 603-633-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MILFORD NH
2023-01-30 603-633-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J MILFORD NH
2022-10-12 603-500-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J TILTON NH
2022-10-06 603-697-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J DOVER NH
2022-10-06 603-697-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DOVER NH
2022-10-06 603-697-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DOVER NH
2022-09-29 603-649-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J JAFFREY NH
2022-09-02 603-414-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SUNAPEE NH
2022-09-02 603-458-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SALEM NH
2022-09-02 603-458-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J SALEM NH
2022-09-02 603-741-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NEW BOSTON NH
2022-09-01 603-619-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LACONIA NH
2021-09-09 603-441-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ROCHESTER NH
2021-09-09 603-441-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J ROCHESTER NH
2021-08-31 603-365-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MERRIMACK NH
2021-08-31 603-365-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MERRIMACK NH
2021-08-31 603-368-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J PORTSMOUTH NH
2021-08-31 603-368-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J PORTSMOUTH NH
2021-08-31 603-751-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PELHAM NH
2021-08-31 603-751-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J PELHAM NH
2020-08-25 603-800-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MEREDITH NH
2020-04-30 603-409-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LACONIA NH
2020-02-24 603-288-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NASHUA NH
2019-10-29 603-403-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ROCHESTER NH
2019-10-03 603-406-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CONCORD NH
2019-06-07 603-519-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J EXETER NH
2019-06-07 603-967-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HAMPTON NH
2019-04-01 603-484-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NASHUA NH
2019-02-28 603-506-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2019-02-28 603-605-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DOVER NH
2019-02-28 603-685-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SALEM NH
2018-10-09 603-404-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DERRY NH
2018-09-05 603-854-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J MANCHESTER NH
2018-08-10 603-350-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MILTON NH
2018-07-31 603-403-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J ROCHESTER NH
2017-12-27 603-333-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CONCORD NH

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.