NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

2 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 564
T-MOBILE USA, INC. 1
LTE WIRELESS INC. 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
2022-03-16 564-653 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J VANCOUVER WA
2022-03-15 564-669 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OLYMPIA WA
2022-03-11 564-633 2XXX3XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WINLOCK WA
2022-03-11 564-665 4XXX5XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OCOSTA WA
2022-03-09 564-220 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 CENTRALIA WA
2022-03-08 564-626 2XXX4XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PACIFICBCH WA
2022-01-27 564-229 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2022-01-07 564-219 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
2021-12-30 564-217 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LONGVIEW WA
2021-12-21 564-666 0XXX1XXX2XXX3XXX6XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H VADER WA
2021-11-22 564-900 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MT VERNON WA
2021-10-26 564-216 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CENTRALIA WA
2021-10-13 564-232 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2021-09-15 564-214 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 YACOLT WA
2021-08-26 564-225 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WA 006F OLYMPIA WA
2021-08-10 564-205 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BREMERTON WA
2021-08-05 564-333 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LONGVIEW WA
2021-08-02 564-222 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SILVERDALE WA
2021-06-09 564-212 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ABERDEEN WA
2021-05-04 564-210 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2021-04-21 564-234 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BUCKLEY WA
2021-04-21 564-465 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H ORTING WA
2021-04-21 564-529 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H ROCHESTER WA
2021-04-18 564-676 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OAK HARBOR WA
2021-03-22 564-207 1XXX2XXX which blocks → NUSO, LLC 478J TENINO WA
2021-03-10 564-444 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H VANCOUVER WA
2021-02-16 564-209 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 WHATCOMCTY WA
2021-01-19 564-244 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LONGVIEW WA
2021-01-12 564-208 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 VANCOUVER WA
2020-12-14 564-204 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CENTRALIA WA
2020-11-18 564-203 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 478J PT ANGELES WA
2020-11-18 564-524 1XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - WA 483E COPALIS WA
2020-10-30 564-464 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E OLYMPIA WA
2020-10-29 564-200 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J OLYMPIA WA
2020-10-27 564-202 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2020-10-22 564-544 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E ABERDEEN WA
2020-10-22 564-546 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WA 483E BELFAIR WA
2020-10-22 564-654 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - WA 483E BREMERTON WA
2020-09-02 564-201 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OLYMPIA WA
2019-04-16 564-777 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J CASTLEROCK WA
2019-02-25 564-999 0–9 XXXall 10 · 7 holders which blocks → TERRA NOVA TELECOM INC. 145J OLYMPIA WA
2018-12-28 564-888 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J VANCOUVER WA
2018-07-17 564-240 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9638 SILVERDALE WA
2017-06-30 564-397 0–9 XXXall 10 · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
— 564-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 564-213 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WA 483E WHATCOMCTY WA
— 564-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 564-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 564-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX WA
— 564-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST WA

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.