Recent thousands-block assignments

18 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2018-06-14	878-355-4XXX	4000–4999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	UNIONTOWN	PA
2018-06-14	878-439-2XXX	2000–2999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	ROCHESTER	PA
2018-05-23	878-425-2XXX	2000–2999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	SAXONBURG	PA
2018-05-23	878-425-3XXX	3000–3999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	SAXONBURG	PA
2018-05-23	878-439-7XXX	7000–7999	Assigned	COMCAST IP PHONE, LLC	318J	ROCHESTER	PA
2018-05-23	878-888-3XXX	3000–3999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	PARKWOOD	PA
2018-05-23	878-888-5XXX	5000–5999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	PARKWOOD	PA
2018-05-22	878-378-2XXX	2000–2999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	WESTNEWTON	PA
2018-05-22	878-378-3XXX	3000–3999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	WESTNEWTON	PA
2018-05-22	878-378-4XXX	4000–4999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	WESTNEWTON	PA
2018-05-22	878-666-2XXX	2000–2999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	MARION CTR	PA
2018-05-22	878-666-3XXX	3000–3999	Assigned	CORE COMMUNICATIONS, INC. - PA	3806	MARION CTR	PA
2018-04-26	878-212-3XXX	3000–3999	Assigned	COMCAST IP PHONE, LLC	318J	WASHINGTON	PA
2018-03-30	878-214-3XXX	3000–3999	Assigned	AERIAL COMMUNICATIONS, INC.	6701	GREENSBURG	PA
2018-03-26	878-208-7XXX	7000–7999	Assigned	COMCAST IP PHONE, LLC	318J	CRIDERSCOR	PA
2018-03-23	878-206-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	FAIRCHANCE	PA
2018-02-23	878-439-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ROCHESTER	PA
2018-02-23	878-847-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	NEWKNSNGTN	PA
2018-01-30	878-205-2XXX	2000–2999	Assigned	ONVOY, LLC - PA	547E	CONNELLSVL	PA
2018-01-30	878-439-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	ROCHESTER	PA
2018-01-17	878-220-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	EXPORT	PA
2018-01-16	878-214-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	GREENSBURG	PA
2018-01-08	878-379-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	WAYNESBURG	PA
2017-12-14	878-221-7XXX	7000–7999	Assigned	AERIAL COMMUNICATIONS, INC.	6701	BUTLER	PA
2017-12-14	878-221-8XXX	8000–8999	Assigned	AERIAL COMMUNICATIONS, INC.	6701	BUTLER	PA
2017-12-14	878-221-9XXX	9000–9999	Assigned	AERIAL COMMUNICATIONS, INC.	6701	BUTLER	PA
2017-12-13	878-208-6XXX	6000–6999	Assigned	ARMSTRONG TELECOMMUNICATIONS, INC. - PA	422C	CRIDERSCOR	PA
2017-12-13	878-214-0XXX	0000–0999	Assigned	IP HORIZON LLC	515J	GREENSBURG	PA
2017-12-13	878-333-5XXX	5000–5999	Assigned	IP HORIZON LLC	515J	ELLWOOD CY	PA
2017-12-13	878-333-6XXX	6000–6999	Assigned	IP HORIZON LLC	515J	ELLWOOD CY	PA
2017-12-12	878-222-9XXX	9000–9999	Assigned	IP HORIZON LLC	515J	NEWWLMNGTN	PA
2017-12-12	878-271-3XXX	3000–3999	Assigned	AERIAL COMMUNICATIONS, INC.	6701	BUTLER	PA
2017-12-12	878-400-1XXX	1000–1999	Assigned	IP HORIZON LLC	515J	WAMPUM	PA
2017-12-12	878-666-0XXX	0000–0999	Assigned	IP HORIZON LLC	515J	MARION CTR	PA
2017-12-11	878-203-6XXX	6000–6999	Assigned	IP HORIZON LLC	515J	CHARLEROI	PA
2017-12-11	878-444-8XXX	8000–8999	Assigned	IP HORIZON LLC	515J	HOMER CITY	PA
2017-12-11	878-777-8XXX	8000–8999	Assigned	IP HORIZON LLC	515J	DERRY	PA
2017-12-04	878-212-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	WASHINGTON	PA
2017-12-04	878-214-2XXX	2000–2999	Assigned	IDT AMERICA, CORP. - PA	213C	GREENSBURG	PA
2017-11-29	878-203-2XXX	2000–2999	Assigned	IDT AMERICA, CORP. - PA	213C	CHARLEROI	PA
2017-11-02	878-208-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	CRIDERSCOR	PA
2017-11-02	878-355-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	UNIONTOWN	PA
2017-10-27	878-207-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ROCHESTER	PA
2017-10-27	878-333-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ELLWOOD CY	PA
2017-10-25	878-238-7XXX	7000–7999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	LIGONIER	PA
2017-09-29	878-439-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	ROCHESTER	PA
2017-09-28	878-208-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - PA	4007	CRIDERSCOR	PA
2017-09-27	878-645-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	GREENSBURG	PA
2017-09-13	878-332-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - PA	4007	WEXFORD	PA
2017-08-15	878-355-0XXX	0000–0999	Assigned	IDT AMERICA, CORP. - PA	213C	UNIONTOWN	PA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.