NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

2 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 947
NEW CINGULAR WIRELESS PCS, LLC - IL 2
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
2020-06-24 947-223 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C COMMERCE MI
2020-06-23 947-941 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C ROYAL OAK MI
2020-04-29 947-400 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H W BLOOMFLD MI
2020-03-30 947-217 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHFIELD MI
2020-03-30 947-218 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TROY MI
2020-01-17 947-216 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MI
2019-12-19 947-500 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PONTIAC MI
2019-12-18 947-300 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CLARKSTON MI
2019-12-18 947-600 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H NORTHVILLE MI
2019-10-31 947-519 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ROYAL OAK MI
2019-10-30 947-518 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ROYAL OAK MI
2019-07-18 947-900 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SOUTHFIELD MI
2019-03-12 947-215 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHFIELD MI
2019-02-08 947-622 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E LAKE ORION MI
2018-12-31 947-520 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ROYAL OAK MI
2018-12-31 947-523 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ROYAL OAK MI
2018-11-01 947-214 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G WALLEDLAKE MI
2018-10-19 947-985 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G SOUTHFIELD MI
2018-10-08 947-521 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ROYAL OAK MI
2018-09-28 947-221 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E DRAYTON PL MI
2018-09-26 947-210 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 PONTIAC MI
2018-09-24 947-207 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E SOUTH LYON MI
2018-09-24 947-208 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 AUBURN HTS MI
2018-08-31 947-209 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TROY MI
2018-04-17 947-886 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PONTIAC MI
2018-02-09 947-522 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E ROYAL OAK MI
2018-01-11 947-205 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TROY MI
2017-11-01 947-465 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COMMERCE MI
2017-10-25 947-204 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MILFDWH LK MI
2017-09-01 947-252 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 AUBURN HTS MI
2017-06-07 947-203 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 OXFORD MI
2017-04-27 947-201 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 AUBURN HTS MI
2017-03-08 947-414 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PONTIAC MI
2016-04-25 947-200 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C ORTONVILLE MI
2016-04-25 947-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C MILFDWH LK MI
2015-09-29 947-222 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C DRAYTON PL MI
2015-09-29 947-333 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C LAKE ORION MI
2015-09-29 947-800 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C COMMERCE MI
2015-09-29 947-999 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C PONTIAC MI
2015-08-19 947-888 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C CLARKSTON MI
2015-06-16 947-777 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C MILFDWH LK MI
2006-06-02 947-255 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CLARKSTON MI
2006-06-02 947-264 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CLARKSTON MI
2006-06-02 947-326 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CLARKSTON MI
2006-06-02 947-361 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CLARKSTON MI
2006-06-02 947-420 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CLARKSTON MI
2006-06-02 947-509 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CLARKSTON MI
2006-06-02 947-577 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CLARKSTON MI
2006-06-02 947-749 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CLARKSTON MI
2006-06-02 947-823 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CLARKSTON MI

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.