With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators
www.eff.org
September 18, 2026 at 7:57 PM
With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
If you are going to a No Kings protest this weekend, be sure to review our Surveillance Self Defense guide for attending a protest and bring Rayhunter along for the ride! ssd.eff.org/module/atte.... eff.org/rayhunter.
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators
www.eff.org
October 17, 2025 at 10:04 PM
If you are going to a No Kings protest this weekend, be sure to review our Surveillance Self Defense guide for attending a protest and bring Rayhunter along for the ride! ssd.eff.org/module/atte.... eff.org/rayhunter.
With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators
www.eff.org
May 3, 2026 at 9:02 PM
With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators
www.eff.org
November 15, 2025 at 8:00 PM
With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
We know very little about how cell-site simulators (CSS), devices that masquerade as legitimate cell-phone towers, are being deployed in the US or globally, but with Rayhunter, we hope to change that. www.eff.org/deeplinks/2...
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators
www.eff.org
August 26, 2025 at 10:56 PM
We know very little about how cell-site simulators (CSS), devices that masquerade as legitimate cell-phone towers, are being deployed in the US or globally, but with Rayhunter, we hope to change that. www.eff.org/deeplinks/2...
Cell-site simulators (CSS, also known as Stingrays or IMSI catchers) are devices that masquerade as legitimate cell-phone towers, tricking phones within a certain radius into connecting to the device rather than a tower. Our tool, Rayhunter, can help you find them. www.eff.org/deeplinks/2...
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators
www.eff.org
August 12, 2025 at 11:57 PM
Cell-site simulators (CSS, also known as Stingrays or IMSI catchers) are devices that masquerade as legitimate cell-phone towers, tricking phones within a certain radius into connecting to the device rather than a tower. Our tool, Rayhunter, can help you find them. www.eff.org/deeplinks/2...
With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators
www.eff.org
December 28, 2025 at 3:04 PM
With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators
www.eff.org
May 24, 2026 at 9:01 PM
With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
At EFF we spend a lot of time thinking about the tech used by police and authorities to spy on you while you’re going about your everyday life, like cell-site simulators (CSS). Rayhunter is an open source tool we’ve created that we hope empowers everyone to help search out CSS around the world.
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular Spying
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators (CSS...
www.eff.org
July 31, 2025 at 7:42 PM
At EFF we spend a lot of time thinking about the tech used by police and authorities to spy on you while you’re going about your everyday life, like cell-site simulators (CSS). Rayhunter is an open source tool we’ve created that we hope empowers everyone to help search out CSS around the world.
Got my Orbic reflashed with rayhunter
January 22, 2025 at 12:57 AM
Got my Orbic reflashed with rayhunter
With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators
www.eff.org
May 21, 2026 at 2:01 PM
With Rayhunter, we can find out how cell site simulators are being used, and protect ourselves and our communities from this form of surveillance. www.eff.org/deeplinks/2...
We’re thankful to every single person who has installed Rayhunter, taken it out into the world, and helped gather more data about cell-site simulators. github.com/EFForg/rayh...
GitHub - EFForg/rayhunter: Rust tool to detect cell site simulators on an orbic mobile hotspot
Rust tool to detect cell site simulators on an orbic mobile hotspot - GitHub - EFForg/rayhunter: Rust tool to detect cell site simulators on an orbic mobile hotspot
github.com
November 27, 2025 at 2:33 PM
We’re thankful to every single person who has installed Rayhunter, taken it out into the world, and helped gather more data about cell-site simulators. github.com/EFForg/rayh...
If you bring Rayhunter to a protest this weekend (or ever), please send us the results, even if you didn’t find anything! Negative results can still help us better understand how and when CSS are being used. efforg.github.io/rayhunter/s...
March 28, 2026 at 1:59 PM
If you bring Rayhunter to a protest this weekend (or ever), please send us the results, even if you didn’t find anything! Negative results can still help us better understand how and when CSS are being used. efforg.github.io/rayhunter/s...
If you bring Rayhunter to a protest this weekend (or ever), please send us the results, even if you didn’t find anything! Negative results can still help us better understand how and when CSS are being used. efforg.github.io/rayhunter/s...
October 18, 2025 at 12:41 PM
If you bring Rayhunter to a protest this weekend (or ever), please send us the results, even if you didn’t find anything! Negative results can still help us better understand how and when CSS are being used. efforg.github.io/rayhunter/s...
Cell-site simulators (CSS, also known as Stingrays or IMSI catchers) are devices that masquerade as legitimate cell-phone towers, tricking phones within a certain radius into connecting to the device rather than a tower. Our tool, Rayhunter, can help you find them. www.eff.org/deeplinks/2...
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators
www.eff.org
May 11, 2026 at 8:03 PM
Cell-site simulators (CSS, also known as Stingrays or IMSI catchers) are devices that masquerade as legitimate cell-phone towers, tricking phones within a certain radius into connecting to the device rather than a tower. Our tool, Rayhunter, can help you find them. www.eff.org/deeplinks/2...
We haven’t found evidence of Stingrays being used at protests in the US yet, but if you’re going to a protest, why not bring Rayhunter to be sure? Don’t forget to charge and update it, then let us know what you find! efforg.github.io/rayhunter/s...
January 30, 2026 at 2:33 PM
We haven’t found evidence of Stingrays being used at protests in the US yet, but if you’re going to a protest, why not bring Rayhunter to be sure? Don’t forget to charge and update it, then let us know what you find! efforg.github.io/rayhunter/s...
We haven’t found evidence of Stingrays being used at protests in the US yet, but if you’re going to a protest this weekend, why not bring Rayhunter to be sure? Don’t forget to charge and update it, then let us know what you find! efforg.github.io/rayhunter/s...
March 26, 2026 at 10:07 PM
We haven’t found evidence of Stingrays being used at protests in the US yet, but if you’re going to a protest this weekend, why not bring Rayhunter to be sure? Don’t forget to charge and update it, then let us know what you find! efforg.github.io/rayhunter/s...
To learn more about Rayhunter and how you can locate cell-site simulators in your community, head to www.eff.org/Rayhunter.
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators
www.eff.org
January 7, 2026 at 6:06 PM
To learn more about Rayhunter and how you can locate cell-site simulators in your community, head to www.eff.org/Rayhunter.
I work with cool people who do cool things: www.eff.org/deeplinks/20...
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular Spying
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators (CSS...
www.eff.org
March 5, 2025 at 10:32 PM
I work with cool people who do cool things: www.eff.org/deeplinks/20...
Cell-site simulators (CSS, also known as Stingrays or IMSI catchers) are devices that masquerade as legitimate cell-phone towers, tricking phones within a certain radius into connecting to the device rather than a tower. Our new tool, Rayhunter, can help you find them.
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular Spying
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators (CSS...
www.eff.org
March 5, 2025 at 8:21 PM
Cell-site simulators (CSS, also known as Stingrays or IMSI catchers) are devices that masquerade as legitimate cell-phone towers, tricking phones within a certain radius into connecting to the device rather than a tower. Our new tool, Rayhunter, can help you find them.
Is ICE about to go buck wild using cell site simulators? Good thing EFF has a project to help you detect them:
www.eff.org/deeplinks/20...
www.forbes.com/sites/the-wi...
www.eff.org/deeplinks/20...
www.forbes.com/sites/the-wi...
Meet Rayhunter: A New Open Source Tool from EFF to Detect Cellular Spying
Rayhunter is a new open source tool we’ve created that runs off an affordable mobile hotspot that we hope empowers everyone, regardless of technical skill, to help search out cell-site simulators (CSS...
www.eff.org
September 10, 2025 at 12:43 AM
Is ICE about to go buck wild using cell site simulators? Good thing EFF has a project to help you detect them:
www.eff.org/deeplinks/20...
www.forbes.com/sites/the-wi...
www.eff.org/deeplinks/20...
www.forbes.com/sites/the-wi...
Just because CSS don't appear to be used to spy on protests in the US right now doesn't mean that is true everywhere. We are interested in getting Rayhunter data from every country to help us understand the global use of CSS and to refine our signatures. www.eff.org/deeplinks/2...
Rayhunter: What We Have Found So Far
Rayhunter is a program that runs on a variety of mobile hotspots and watches for cell-site simulators—a tool police use to locate or identify people's cell phones, also known as IMSI catchers or
www.eff.org
November 2, 2025 at 9:58 PM
Just because CSS don't appear to be used to spy on protests in the US right now doesn't mean that is true everywhere. We are interested in getting Rayhunter data from every country to help us understand the global use of CSS and to refine our signatures. www.eff.org/deeplinks/2...
If you bring Rayhunter to a protest today (or ever), please send us the results, even if you didn’t find anything! Negative results can still help us better understand how and when CSS are being used. efforg.github.io/rayhunter/s...
January 30, 2026 at 2:33 PM
If you bring Rayhunter to a protest today (or ever), please send us the results, even if you didn’t find anything! Negative results can still help us better understand how and when CSS are being used. efforg.github.io/rayhunter/s...
We haven’t found evidence of Stingrays being used at protests in the US yet, but if you’re going to a No Kings protest this weekend, why not bring Rayhunter to be sure? Don’t forget to charge and update it, then let us know what you find! efforg.github.io/rayhunter/s...
October 17, 2025 at 4:03 PM
We haven’t found evidence of Stingrays being used at protests in the US yet, but if you’re going to a No Kings protest this weekend, why not bring Rayhunter to be sure? Don’t forget to charge and update it, then let us know what you find! efforg.github.io/rayhunter/s...