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
2013-07-15 413-275-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HOLYOKE MA
2013-07-10 413-557-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHICOPEE MA
2013-07-09 413-517-5XXX 5000–5999Assigned METROPCS, INC. 5562 NORTHAMPTN MA
2013-06-25 413-437-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 HOLYOKE MA
2013-06-21 413-544-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PALMER MA
2013-06-19 413-888-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHICOPEE MA
2013-06-13 413-801-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2013-06-13 413-801-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2013-06-10 413-923-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J NORTHAMPTN MA
2013-05-22 413-402-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SHEFFIELD MA
2013-05-21 413-564-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 WESTFIELD MA
2013-05-21 413-727-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NORTHAMPTN MA
2013-04-24 413-821-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J SPRINGFLD MA
2013-04-10 413-672-0XXX 0000–0999Assigned IP HORIZON LLC 515J NORTHADAMS MA
2013-04-05 413-345-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2013-04-05 413-887-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HOLYOKE MA
2013-04-01 413-309-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2013-04-01 413-309-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2013-04-01 413-309-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2013-04-01 413-309-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2013-03-26 413-276-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2013-03-26 413-302-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2013-03-26 413-523-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2013-03-26 413-784-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2013-03-26 413-784-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 SPRINGFLD MA
2013-03-22 413-517-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E NORTHAMPTN MA
2013-03-22 413-992-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E AMHERST MA
2013-03-20 413-992-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 AMHERST MA
2013-03-15 413-356-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHICOPEE MA
2013-03-06 413-517-7XXX 7000–7999Assigned METROPCS, INC. 5562 NORTHAMPTN MA
2013-02-28 413-449-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PITTSFIELD MA
2013-02-26 413-784-3XXX 3000–3999Assigned METROPCS, INC. 5562 SPRINGFLD MA
2013-02-22 413-302-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2013-02-22 413-302-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2013-02-22 413-302-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2013-02-22 413-302-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SPRINGFLD MA
2013-02-20 413-992-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2013-01-30 413-276-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SPRINGFLD MA
2013-01-30 413-276-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SPRINGFLD MA
2013-01-18 413-813-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WARE MA
2013-01-18 413-888-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHICOPEE MA
2013-01-03 413-289-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J PALMER MA
2012-12-21 413-672-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORTHADAMS MA
2012-12-21 413-923-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORTHAMPTN MA
2012-12-21 413-992-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2012-12-13 413-217-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D WILLIAMSTN MA
2012-12-13 413-298-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D STOCKBDG MA
2012-12-13 413-338-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D WARREN MA
2012-12-13 413-340-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D WILLIAMSBG MA
2012-12-13 413-350-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D SO DEERFLD 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.