NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 971
NEW CINGULAR WIRELESS PCS, LLC 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
2001-02-20 971-212 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2001-01-15 971-563 2XXX5XXX which blocks → METROPCS, INC. 5562 PORTLAND OR
— 971-204 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 CLACKAMAS OR
— 971-205 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 BEAVERTON OR
— 971-206 1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 CLACKAMAS OR
— 971-207 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
— 971-210 not yet reported which blocks → ELTOPIA COMMUNICATIONS LLC - OR 647F ST HELENS OR
— 971-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 971-216 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 WOODBURN OR
— 971-218 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SALEM OR
— 971-220 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F GRESHAM OR
— 971-222 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 PORTLAND OR
— 971-223 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BEAVERTON OR
— 971-225 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 ST HELENS OR
— 971-226 none assigned yet which blocks → METROPCS, INC. 5562 BEAVERTON OR
— 971-228 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEAVERTON OR
— 971-231 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F GRESHAM OR
— 971-234 9XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 PORTLAND OR
— 971-242 8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9638 PORTLAND OR
— 971-244 2XXX3XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
— 971-247 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELNYX LLC 073H NORTH PL OR
— 971-249 2XXX3XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BEAVERTON OR
— 971-250 1XXX2XXX3XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BEAVERTON OR
— 971-272 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 STFRD-SNDY OR
— 971-298 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - OR 750E GRANDRONDE OR
— 971-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 971-327 1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BEAVERTON OR
— 971-349 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
— 971-363 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 ST HELENS OR
— 971-404 1XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
— 971-409 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
— 971-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 971-421 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
— 971-500 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
— 971-501 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E PORTLAND OR
— 971-506 not yet reported which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
— 971-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 971-544 7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9638 PORTLAND OR
— 971-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST OR
— 971-570 not yet reported which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
— 971-583 not yet reported which blocks → OR
— 971-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 971-634 not yet reported which blocks → ONVOY, LLC - OR 750E PORTLAND OR
— 971-645 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 PORTLAND OR
— 971-700 not yet reported which blocks → OR
— 971-707 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
— 971-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 971-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 971-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 971-925 not yet reported which blocks → XO OREGON, INC. 4980 CLACKAMAS OR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.