EXHIBIT 21.1

List of Subsidiaries of Nine Energy Service, Inc.

Name	Jurisdiction
CDK Perforating, LLC	Texas
Crest Pumping Technologies, LLC	Delaware
Dak-Tana Wireline, LLC	Delaware
Frac Technology AS	Norway
Magnum Oil Tools GP, LLC	Texas
Magnum Oil Tools International, LTD	Texas
MOTI Holdco, LLC	Delaware
Nine Downhole Norway AS	Norway
Nine Downhole Technologies, LLC	Delaware
Nine Energy Canada Inc.	Alberta, Canada
Nine Energy Service, LLC	Delaware
Northern States Completions, Inc.	Delaware
Peak Pressure Control, LLC	Texas
RedZone Coil Tubing, LLC	Texas