NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

18 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 878
ONVOY, LLC - PA 10
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 4
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 3
BANDWIDTH.COM CLEC, LLC - PA 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
2019-03-13 878-666-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MARION CTR PA
2019-03-13 878-666-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MARION CTR PA
2019-03-08 878-238-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LIGONIER PA
2019-03-08 878-238-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LIGONIER PA
2019-03-08 878-238-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LIGONIER PA
2019-03-08 878-238-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 LIGONIER PA
2019-03-07 878-258-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 FREEPORT PA
2019-03-07 878-258-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 FREEPORT PA
2019-03-07 878-258-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 FREEPORT PA
2019-03-07 878-258-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 FREEPORT PA
2019-02-25 878-787-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2019-02-21 878-219-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J FARMINGTON PA
2019-02-21 878-787-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2019-02-13 878-266-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ELDERTON PA
2019-02-13 878-355-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J UNIONTOWN PA
2019-02-11 878-225-0XXX 0000–0999Assigned PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E ELLWOOD CY PA
2019-02-04 878-228-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 UNIONTOWN PA
2019-02-04 878-266-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 ELDERTON PA
2019-01-29 878-787-8XXX 8000–8999Assigned FRACTEL, LLC 965H PTTSBGZON1 PA
2019-01-09 878-332-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 WEXFORD PA
2018-12-10 878-217-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 CRIDERSCOR PA
2018-12-05 878-213-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F PTTSBGZON1 PA
2018-11-20 878-207-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCHESTER PA
2018-11-20 878-207-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCHESTER PA
2018-11-20 878-207-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCHESTER PA
2018-11-19 878-207-1XXX 1000–1999Assigned METROPCS, INC. 5562 ROCHESTER PA
2018-11-19 878-670-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2018-11-19 878-670-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2018-11-19 878-670-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2018-11-19 878-670-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2018-11-12 878-670-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2018-11-12 878-670-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2018-11-12 878-670-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2018-11-08 878-332-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WEXFORD PA
2018-10-22 878-302-9XXX 9000–9999Assigned PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E NEWKNSNGTN PA
2018-10-17 878-208-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CRIDERSCOR PA
2018-09-26 878-309-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F GREENSBURG PA
2018-09-25 878-212-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F WASHINGTON PA
2018-09-14 878-379-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 WAYNESBURG PA
2018-09-11 878-214-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J GREENSBURG PA
2018-09-11 878-214-9XXX 9000–9999Assigned METROPCS, INC. 5562 GREENSBURG PA
2018-08-23 878-216-0XXX 0000–0999Assigned ONVOY, LLC - PA 547E REPUBLIC PA
2018-08-23 878-439-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCHESTER PA
2018-08-20 878-205-8XXX 8000–8999Assigned ONVOY, LLC - PA 547E CONNELLSVL PA
2018-07-12 878-212-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WASHINGTON PA
2018-06-19 878-214-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F GREENSBURG PA
2018-06-14 878-222-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWWLMNGTN PA
2018-06-14 878-222-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 NEWWLMNGTN PA
2018-06-14 878-355-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 UNIONTOWN PA
2018-06-14 878-355-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 UNIONTOWN PA

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.