NumberResearchThousands-blocks in 412-428
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 412-428 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 412 blocks
Most active assignees, all time — NPA 412
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 412-428-0XXX | 0000–0999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTGSBNZN14 | PA |
| 2022-08-30 | 412-428-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | PTGSBNZN14 | PA |
| 2022-08-30 | 412-428-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | PTGSBNZN14 | PA |
| 2023-05-24 | 412-428-3XXX | 3000–3999 | Assigned | ONVOY, LLC - PA | 547E | PTGSBNZN14 | PA |
| 2022-08-04 | 412-428-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | PTGSBNZN14 | PA |
| — | 412-428-5XXX | 5000–5999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTGSBNZN14 | PA |
| 2023-03-23 | 412-428-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA | 967E | PTGSBNZN14 | PA |
| — | 412-428-7XXX | 7000–7999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTGSBNZN14 | PA |
| 2023-01-31 | 412-428-8XXX | 8000–8999 | Assigned | ONVOY, LLC - PA | 547E | PTGSBNZN14 | PA |
| — | 412-428-9XXX | 9000–9999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTGSBNZN14 | 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.