NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

14 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 413
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6
BANDWIDTH.COM CLEC, LLC - MA 5
NEW CINGULAR WIRELESS PCS, LLC - DC 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-04-11 413-252-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D BELCHERTN MA
2019-04-11 413-252-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BELCHERTN MA
2019-04-11 413-287-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D RUSSELL MA
2019-04-11 413-287-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D RUSSELL MA
2019-04-11 413-307-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D ADAMS MA
2019-04-11 413-307-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D ADAMS MA
2019-04-11 413-360-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D SANDISFLD MA
2019-04-11 413-360-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D SANDISFLD MA
2019-04-11 413-400-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D MONTAGUE MA
2019-04-11 413-400-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D MONTAGUE MA
2019-04-11 413-409-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D HOLYOKE MA
2019-04-11 413-474-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D CHICOPEE MA
2019-04-11 413-474-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D CHICOPEE MA
2019-04-11 413-498-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D NORTHFIELD MA
2019-04-11 413-679-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D OTIS MA
2019-04-11 413-679-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D OTIS MA
2019-04-11 413-740-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D CUMMINGTON MA
2019-04-11 413-779-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D EASTHAMPTN MA
2019-04-11 413-779-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D EASTHAMPTN MA
2019-04-11 413-813-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D WARE MA
2019-04-11 413-887-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D HOLYOKE MA
2019-03-27 413-305-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 SOUTHWICK MA
2019-03-27 413-758-8XXX 8000–8999Assigned TC SYSTEMS, INC. 7135 WARE MA
2019-03-26 413-217-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 7103 WILLIAMSTN MA
2019-03-19 413-327-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D LEE MA
2019-03-19 413-394-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D LEE MA
2019-03-11 413-224-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ELONGMEDOW MA
2019-03-06 413-331-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D CHICOPEE MA
2019-03-06 413-331-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D CHICOPEE MA
2019-02-28 413-750-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J SPRINGFLD MA
2019-02-06 413-881-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 7103 LENOX MA
2019-01-23 413-326-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORTHAMPTN MA
2019-01-15 413-339-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J CHARLEMONT MA
2019-01-11 413-307-2XXX 2000–2999Assigned CRC COMMUNICATIONS OF MAINE, INC. - MA 236F ADAMS MA
2019-01-11 413-339-1XXX 1000–1999Assigned CRC COMMUNICATIONS OF MAINE, INC. - MA 236F CHARLEMONT MA
2019-01-11 413-412-3XXX 3000–3999Assigned CRC COMMUNICATIONS OF MAINE, INC. - MA 236F NORTHADAMS MA
2019-01-11 413-500-1XXX 1000–1999Assigned CRC COMMUNICATIONS OF MAINE, INC. - MA 236F MONROE BDG MA
2019-01-09 413-438-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WILBRAHAM MA
2019-01-09 413-438-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WILBRAHAM MA
2019-01-09 413-438-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WILBRAHAM MA
2019-01-09 413-438-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WILBRAHAM MA
2018-12-05 413-307-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D ADAMS MA
2018-12-05 413-307-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D ADAMS MA
2018-11-26 413-366-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D WILBRAHAM MA
2018-11-26 413-366-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D WILBRAHAM MA
2018-10-26 413-270-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J NORTHAMPTN MA
2018-10-16 413-685-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON MA
2018-10-04 413-412-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORTHADAMS MA
2018-09-25 413-266-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SPRINGFLD MA
2018-09-19 413-326-2XXX 2000–2999Assigned METROPCS, INC. 5562 NORTHAMPTN 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.