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 445
ONVOY, 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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2020-10-27 445-203 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → VONAGE AMERICA LLC 197D PHPHSBZN32 PA
2020-10-08 445-446 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E SOUDERTON PA
2020-09-28 445-224 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 LANSDALE PA
2020-09-16 445-895 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J PHLDLPHZN1 PA
2020-09-15 445-212 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J PHLDLPHZN1 PA
2020-09-11 445-202 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J PHLDLPHZN1 PA
2020-09-01 445-201 0–9 XXXall 10 · 4 holders which blocks → FINGER LAKES TECHNOLOGIES GROUP, INC. - PA 464H PHLDLPHZN1 PA
2020-08-07 445-465 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PHLDLPHZN4 PA
2020-08-07 445-529 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PHPHSBZN43 PA
2020-08-06 445-234 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PHLDLPHZN1 PA
2020-08-06 445-345 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PHLDLPHZN2 PA
2020-06-24 445-223 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHLDLPHZN1 PA
2020-05-27 445-455 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H PLUMSTEDVL PA
2019-03-21 445-300 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J PHLDLPHZN1 PA
2019-01-28 445-900 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PHPHSBZN40 PA
2018-06-21 445-544 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H PHLDLPHZN1 PA
2018-06-06 445-200 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 QUAKERTOWN PA
2018-06-05 445-500 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN40 PA
2018-06-05 445-600 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PHPHSBZN39 PA
2018-04-11 445-737 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN4 PA
2018-01-17 445-666 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - PA 547E GREEN LANE PA
2018-01-12 445-222 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E PENNSBURG PA
2018-01-12 445-333 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - PA 547E QUAKERTOWN PA
2018-01-12 445-428 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 PHLDLPHZN2 PA
2018-01-12 445-444 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN1 PA
2018-01-12 445-777 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E YARDLEY PA
2018-01-12 445-800 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN3 PA
2018-01-12 445-888 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E PHLDLPHZN2 PA
2018-01-12 445-999 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - PA 547E HARLEYSVL PA
— 445-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 445-273 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - PA 547E NEWTOWN PA
— 445-275 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN2 PA
— 445-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 445-400 0–9 XXXall 10 · 4 holders which blocks → VOIP INNOVATIONS, LLC 597F PHLDLPHZN2 PA
— 445-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 445-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 445-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST PA
— 445-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 445-700 not yet reported which blocks → PA
— 445-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 445-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 445-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 445-950 not yet reported which blocks → PA
— 445-958 not yet reported which blocks → PA
— 445-959 not yet reported which blocks → PA
— 445-976 not yet reported which blocks → 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.