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
2019-09-24 878-213-4XXX 4000–4999Assigned ONVOY, LLC - PA 547E PTTSBGZON1 PA
2019-09-06 878-216-7XXX 7000–7999Assigned ONVOY, LLC - PA 547E REPUBLIC PA
2019-09-06 878-225-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F ELLWOOD CY PA
2019-09-06 878-257-3XXX 3000–3999Assigned ONVOY, LLC - PA 547E TAYLORSTN PA
2019-09-06 878-309-1XXX 1000–1999Assigned PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E GREENSBURG PA
2019-09-06 878-378-6XXX 6000–6999Assigned ONVOY, LLC - PA 547E WESTNEWTON PA
2019-09-06 878-400-5XXX 5000–5999Assigned ONVOY, LLC - PA 547E WAMPUM PA
2019-09-04 878-888-6XXX 6000–6999Assigned ONVOY, LLC - PA 547E PARKWOOD PA
2019-09-03 878-219-2XXX 2000–2999Assigned ONVOY, LLC - PA 547E FARMINGTON PA
2019-09-03 878-444-6XXX 6000–6999Assigned ONVOY, LLC - PA 547E HOMER CITY PA
2019-09-03 878-666-5XXX 5000–5999Assigned ONVOY, LLC - PA 547E MARION CTR PA
2019-09-03 878-900-4XXX 4000–4999Assigned ONVOY, LLC - PA 547E EPALESTINE PA
2019-08-27 878-213-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2019-08-27 878-213-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2019-08-27 878-213-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2019-08-27 878-213-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2019-08-27 878-213-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2019-08-27 878-213-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2019-08-23 878-225-3XXX 3000–3999Assigned ONVOY, LLC - PA 547E ELLWOOD CY PA
2019-08-20 878-879-7XXX 7000–7999Assigned ONVOY, LLC - PA 547E NEWKNSNGTN PA
2019-08-20 878-879-8XXX 8000–8999Assigned ONVOY, LLC - PA 547E NEWKNSNGTN PA
2019-07-26 878-217-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CRIDERSCOR PA
2019-06-20 878-206-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F FAIRCHANCE PA
2019-06-19 878-217-8XXX 8000–8999Assigned ONVOY, LLC - PA 547E CRIDERSCOR PA
2019-06-19 878-258-8XXX 8000–8999Assigned ONVOY, LLC - PA 547E FREEPORT PA
2019-06-19 878-332-9XXX 9000–9999Assigned ONVOY, LLC - PA 547E WEXFORD PA
2019-06-19 878-425-4XXX 4000–4999Assigned ONVOY, LLC - PA 547E SAXONBURG PA
2019-06-14 878-728-7XXX 7000–7999Assigned ONVOY, LLC - PA 547E GIBSONIA PA
2019-06-10 878-220-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J EXPORT PA
2019-05-15 878-206-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F FAIRCHANCE PA
2019-04-26 878-212-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F WASHINGTON PA
2019-04-26 878-212-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F WASHINGTON PA
2019-04-26 878-212-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F WASHINGTON PA
2019-04-26 878-212-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - PA 002F WASHINGTON PA
2019-04-26 878-309-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - PA 4007 GREENSBURG PA
2019-04-22 878-206-6XXX 6000–6999Assigned ONVOY, LLC - PA 547E FAIRCHANCE PA
2019-04-16 878-600-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2019-04-09 878-202-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SHARON PA
2019-04-09 878-202-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SHARON PA
2019-04-09 878-202-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SHARON PA
2019-04-09 878-202-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SHARON PA
2019-04-09 878-202-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SHARON PA
2019-04-09 878-202-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SHARON PA
2019-04-09 878-202-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SHARON PA
2019-04-09 878-202-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC. - PA 3806 SHARON PA
2019-03-29 878-600-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J PTTSBGZON1 PA
2019-03-19 878-837-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 BENTLEYVL PA
2019-03-13 878-257-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TAYLORSTN PA
2019-03-13 878-257-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC. - PA 3806 TAYLORSTN PA
2019-03-13 878-666-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC. - PA 3806 MARION CTR 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.