NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 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, last 30 days — NPA 414
ONVOY, LLC - WI 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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2022-09-26 414-414 0–9 XXXwhole prefix which blocks → ONVOY, LLC - WI 225C MILWAUKZN3 WI
2022-08-29 414-381 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN4 WI
2022-07-14 414-850 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H MILWAUKZN1 WI
2022-07-13 414-373 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MILWAUKZN1 WI
2022-03-15 414-497 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN5 WI
2022-02-24 414-307 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2022-02-04 414-309 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 MILWAUKZN1 WI
2022-01-20 414-317 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2022-01-07 414-742 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MILWAUKZN4 WI
2021-12-15 414-363 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN3 WI
2021-07-02 414-432 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MILWAUKZN5 WI
2021-07-02 414-966 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MILWAUKZN1 WI
2021-06-24 414-268 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D MILWAUKZN3 WI
2021-06-11 414-293 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F MILWAUKZN1 WI
2021-05-03 414-279 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J MILWAUKZN1 WI
2021-04-12 414-677 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN3 WI
2021-02-05 414-415 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H MILWAUKZN3 WI
2021-02-01 414-567 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MILWAUKZN1 WI
2020-11-19 414-284 0–9 XXXall 10 · 4 holders which blocks → STRATUS NETWORKS 495J MILWAUKZN4 WI
2020-10-15 414-285 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MILWAUKZN1 WI
2020-10-02 414-261 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J MILWAUKZN1 WI
2020-08-27 414-786 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MILWAUKZN4 WI
2020-08-27 414-946 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H MILWAUKZN5 WI
2020-08-25 414-726 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MILWAUKZN1 WI
2020-08-20 414-812 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MILWAUKZN1 WI
2020-08-05 414-644 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MILWAUKZN1 WI
2020-06-22 414-441 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN3 WI
2020-05-21 414-260 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J MILWAUKZN1 WI
2020-05-13 414-667 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MILWAUKZN5 WI
2020-03-09 414-251 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MILWAUKZN1 WI
2020-03-02 414-348 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MILWAUKZN4 WI
2020-03-02 414-842 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H MILWAUKZN1 WI
2020-01-13 414-250 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MILWAUKZN1 WI
2019-10-23 414-710 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MILWAUKZN1 WI
2019-07-02 414-867 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H MILWAUKZN1 WI
2019-03-27 414-296 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN1 WI
2019-03-14 414-626 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN5 WI
2019-03-13 414-420 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN4 WI
2017-09-27 414-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN1 WI
2017-09-27 414-998 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D MILWAUKZN1 WI
2017-08-09 414-310 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN1 WI
2017-02-16 414-635 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MILWAUKZN1 WI
2017-01-31 414-253 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F MILWAUKZN1 WI
2017-01-12 414-676 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MILWAUKZN5 WI
2016-08-12 414-252 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C MILWAUKZN1 WI
2015-12-29 414-346 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN5 WI
2015-12-24 414-246 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - WI 225C MILWAUKZN3 WI
2015-11-20 414-240 0–9 XXXwhole prefix which blocks → ONVOY, LLC - WI 225C MILWAUKZN1 WI
2015-11-04 414-999 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F MILWAUKZN1 WI
2015-10-22 414-488 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 MILWAUKZN1 WI

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.