NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 878
ONVOY, LLC - PA 51
TON80 COMMUNICATIONS, LLC 19
ONVOY SPECTRUM, LLC 14
AERIAL COMMUNICATIONS, INC. 14
FRACTEL, LLC 11
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-04-14 878-599 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PTGSBNZN14 PA
2021-04-13 878-252 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CRIDERSCOR PA
2021-04-12 878-598 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AMBRIDGE PA
2021-03-18 878-285 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → STRATUS NETWORKS 495J MTPLEASANT PA
2021-03-08 878-783 2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AVONMORE PA
2021-02-05 878-243 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H WASHINGTON PA
2021-02-04 878-235 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H ROCHESTER PA
2021-01-28 878-226 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E WASHINGTON PA
2021-01-28 878-232 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E ELLWOOD CY PA
2021-01-28 878-233 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PRINCETON PA
2020-12-18 878-884 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - PA 547E GREENSBURG PA
2020-11-18 878-895 0–9 XXXall 10 · 7 holders which blocks → TWILIO INTERNATIONAL, INC. 506J UNIONTOWN PA
2020-10-08 878-887 3XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - PA 547E PARIS PA
2020-10-01 878-278 2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - PA 547E DARLINGTON PA
2020-09-14 878-227 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BEAVER FLS PA
2020-07-27 878-251 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - PA 547E BLACK LICK PA
2020-07-23 878-881 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E BROWNSVL PA
2020-06-16 878-231 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E WEXFORD PA
2020-05-27 878-348 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BEAVER FLS PA
2020-05-27 878-377 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SHARPSVL PA
2020-05-27 878-677 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H NEWWLMNGTN PA
2020-05-27 878-688 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H HOMER CITY PA
2020-05-14 878-880 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E WASHINGTON PA
2020-03-26 878-678 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 BADEN PA
2020-02-11 878-768 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - PA 547E VOLANT PA
2020-02-07 878-778 2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - PA 547E BLACKTOWN PA
2020-02-07 878-788 2XXX3XXX4XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - PA 547E FOXBURG PA
2020-02-07 878-789 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - PA 547E PETROLIA PA
2020-02-05 878-229 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 WASHINGTON PA
2020-01-24 878-877 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E BUTLER PA
2020-01-17 878-224 0XXX1XXX2XXX4XXX6XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FORD CITY PA
2019-11-08 878-223 0–9 XXXall 10 · 7 holders which blocks → CSC WIRELESS, LLC 425J UNIONTOWN PA
2019-08-19 878-879 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E NEWKNSNGTN PA
2019-06-12 878-728 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - PA 547E GIBSONIA PA
2019-03-27 878-600 0–9 XXXall 10 · 2 holders which blocks → TERRA NOVA TELECOM INC. 145J PTTSBGZON1 PA
2019-03-18 878-837 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 BENTLEYVL PA
2019-02-19 878-219 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J FARMINGTON PA
2019-01-28 878-787 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PTTSBGZON1 PA
2018-12-10 878-225 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E ELLWOOD CY PA
2018-12-10 878-257 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - PA 547E TAYLORSTN PA
2018-12-07 878-217 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 CRIDERSCOR PA
2018-12-04 878-213 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PTTSBGZON1 PA
2018-09-25 878-309 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F GREENSBURG PA
2018-08-22 878-216 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E REPUBLIC PA
2018-01-16 878-220 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EXPORT PA
2017-12-14 878-221 0XXX1XXX7XXX8XXX9XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BUTLER PA
2017-12-01 878-214 0–9 XXXall 10 · 9 holders which blocks → IDT AMERICA, CORP. - PA 213C GREENSBURG PA
2017-11-30 878-212 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 WASHINGTON PA
2017-09-28 878-439 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ROCHESTER PA
2017-06-02 878-355 0–9 XXXall 10 · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 UNIONTOWN PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.