StacksVerified U.S. regulatory reference

47 CFR §18.303

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Operation of ISM equipment within the following safety, search and rescue frequency bands is prohibited: 490-510 kHz, 2170-2194 kHz, 8354-8374 kHz, 121.4-121.6 MHz, 156.7-156.9 MHz, and 242.8-243.2 MHz.