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
2008-09-05 413-717-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 GREATBNGTN MA
2008-09-05 413-887-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HOLYOKE MA
2008-09-04 413-862-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 RUSSELL MA
2008-08-11 413-259-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHRSTFKLN MA
2008-08-08 413-272-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2008-08-08 413-544-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PALMER MA
2008-07-24 413-388-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHICOPEE MA
2008-07-22 413-523-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J SPRINGFLD MA
2008-07-21 413-654-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2008-07-21 413-726-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2008-07-15 413-304-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SPRINGFLD MA
2008-07-11 413-557-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D CHICOPEE MA
2008-07-08 413-426-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2008-07-08 413-579-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTFIELD MA
2008-07-08 413-992-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 AMHERST MA
2008-07-03 413-212-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSFIELD MA
2008-07-03 413-242-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSFIELD MA
2008-07-03 413-346-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORTHADAMS MA
2008-07-03 413-347-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PITTSFIELD MA
2008-06-17 413-505-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2008-06-17 413-505-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2008-06-17 413-505-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2008-06-12 413-342-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SPRINGFLD MA
2008-05-28 413-363-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2008-05-28 413-363-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2008-05-16 413-357-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 GRANVILLE MA
2008-05-16 413-893-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MONSON MA
2008-05-16 413-998-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SOUTHWICK MA
2008-05-15 413-391-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SPRINGFLD MA
2008-05-15 413-391-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SPRINGFLD MA
2008-05-15 413-391-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SPRINGFLD MA
2008-05-15 413-391-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SPRINGFLD MA
2008-05-15 413-629-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MA 316E PITTSFIELD MA
2008-05-15 413-629-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MA 316E PITTSFIELD MA
2008-05-15 413-629-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MA 316E PITTSFIELD MA
2008-05-15 413-650-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MA 316E HOLYOKE MA
2008-05-15 413-650-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MA 316E HOLYOKE MA
2008-05-15 413-650-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E HOLYOKE MA
2008-05-15 413-650-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MA 316E HOLYOKE MA
2008-05-15 413-835-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E AMHERST MA
2008-05-15 413-835-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E AMHERST MA
2008-05-15 413-835-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MA 316E AMHERST MA
2008-05-15 413-835-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MA 316E AMHERST MA
2008-05-15 413-888-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CHICOPEE MA
2008-05-15 413-888-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CHICOPEE MA
2008-05-15 413-888-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CHICOPEE MA
2008-05-15 413-888-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CHICOPEE MA
2008-05-13 413-835-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J AMHERST MA
2008-05-12 413-325-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GREENFIELD MA
2008-05-07 413-341-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 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.