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 458
ONVOY, LLC - OR 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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2015-12-22 458-218 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PRINEVILLE OR
2015-11-30 458-217 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 JUNCTIONCY OR
2015-07-06 458-505 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SHADY COVE OR
2015-04-14 458-888 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E STATELINE OR
2014-10-16 458-215 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EUGENE OR
2014-10-06 458-203 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 ROGUERIVER OR
2014-10-06 458-210 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 EUGENE OR
2014-10-06 458-212 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 GRANTSPASS OR
2014-04-29 458-207 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J VENETA OR
2014-04-18 458-214 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PHOENIX OR
2014-04-18 458-216 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MARCOLA OR
2012-09-11 458-202 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E BEND OR
2011-10-03 458-200 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 CASCADELKS OR
2011-08-18 458-206 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF OREGON, LLC - OR 7537 BEND OR
2011-06-16 458-205 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF OREGON, LLC - OR 7537 EUGENE OR
— 458-201 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E EUGENE OR
— 458-208 not yet reported which blocks → OR
— 458-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 458-222 not yet reported which blocks → OR
— 458-224 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 ONTARIO OR
— 458-230 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E COOS BAY OR
— 458-248 0XXX1XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 LOWELL OR
— 458-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 458-333 not yet reported which blocks → OR
— 458-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 458-444 not yet reported which blocks → OR
— 458-503 not yet reported which blocks → OR
— 458-509 not yet reported which blocks → OR
— 458-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 458-541 not yet reported which blocks → OR
— 458-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST OR
— 458-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 458-700 not yet reported which blocks → OR
— 458-703 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → ONVOY, LLC - OR 750E CANYONVL OR
— 458-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 458-775 not yet reported which blocks → OR
— 458-802 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E ROSEBURG OR
— 458-803 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E ROSEBURG OR
— 458-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 458-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 458-950 not yet reported which blocks → OR
— 458-958 not yet reported which blocks → OR
— 458-959 not yet reported which blocks → OR
— 458-971 not yet reported which blocks → OR
— 458-976 not yet reported which blocks → OR
— 458-986 not yet reported which blocks → OR

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.