NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2022-01-05 252-612 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 6 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BELHAVEN NC
2022-01-05 272-424 2XXX4XXX5XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TOWANDA PA
2022-01-05 272-632 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PITTSTON PA
2022-01-05 272-633 1XXX2XXX3XXX4XXX6XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MUHLENBURG PA
2022-01-05 346-542 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOUSTON TX
2022-01-05 425-683 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EVERETT WA
2022-01-05 445-230 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2022-01-05 501-518 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F DAMASCUS AR
2022-01-05 502-659 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SIMPSONVL KY
2022-01-05 539-275 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OKEMAH OK
2022-01-05 539-278 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F EUFAULA OK
2022-01-05 539-279 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F AVANT OK
2022-01-05 539-282 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OWASSO OK
2022-01-05 539-357 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BARTLESVL OK
2022-01-05 825-945 not yet reported which blocks → TELUS Mobility 8301 Calgary —
2022-01-05 947-241 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHFIELD MI
2022-01-05 986-942 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PAYETTE ID
2022-01-04 220-219 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 PATASKALA OH
2022-01-04 223-279 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARISBGZN2 PA
2022-01-04 279-223 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SCRM MAIN CA
2022-01-04 445-242 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN1 PA
2022-01-04 445-255 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2022-01-04 470-916 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E CONCORD GA
2022-01-04 539-272 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F OILTON OK
2022-01-04 563-307 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 DUBUQUE IA
2022-01-04 620-572 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E COPELAND KS
2022-01-04 620-573 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E ENGLEWOOD KS
2022-01-04 620-574 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E FORD KS
2022-01-04 620-576 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E INGALLS KS
2022-01-04 620-578 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E MONTEZUMA KS
2022-01-04 620-579 1XXX which blocks → IDEATEK TELCOM, LLC - KS 014E SPEARVILLE KS
2022-01-04 681-406 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TERRA ALTA WV
2022-01-04 734-602 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J YPSILANTI MI
2022-01-04 769-372 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MERIDIAN MS
2022-01-04 769-376 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NATCHEZ MS
2022-01-04 769-378 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HATTIESBG MS
2022-01-04 810-303 0XXX1XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ALGONAC MI
2022-01-04 839-212 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWBERRY SC
2022-01-04 839-837 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ORANGEBURG SC
2022-01-04 947-245 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DRAYTON PL MI
2022-01-04 947-249 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HOLLY MI
2022-01-04 947-251 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J OXFORD MI
2022-01-04 947-257 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PONTIAC MI
2022-01-04 985-426 0–9 XXXall 10 · 8 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HOUMA LA
2021-12-30 225-472 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BATONROUGE LA
2021-12-30 423-776 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 PIKEVILLE TN
2021-12-30 559-809 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J VISALIA CA
2021-12-30 564-217 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LONGVIEW WA
2021-12-30 605-503 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J RAPID CITY SD
2021-12-30 618-814 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 EWING IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.