47 CFR § 18.301 - Operating frequencies.

---
identifier: "/us/cfr/t47/s18.301"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "47 CFR § 18.301 - Operating frequencies."
title_number: 47
title_name: "Telecommunication"
section_number: "18.301"
section_name: "Operating frequencies."
chapter_name: "FEDERAL COMMUNICATIONS COMMISSION"
subchapter_number: "A"
subchapter_name: "GENERAL"
part_number: "18"
part_name: "INDUSTRIAL, SCIENTIFIC, AND MEDICAL EQUIPMENT"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "47 U.S.C. 154, 301, 302, 303, 304, 307."
regulatory_source: "50 FR 36067, Sept. 5, 1985, unless otherwise noted."
cfr_part: "18"
---


# 18.301 Operating frequencies.

ISM equipment may be operated on any frequency above 9 kHz except as indicated in § 18.303. The following frequency bands, in accordance with § 2.106 of the rules, are designated for use by ISM equipment:

Table 1 to § 18.301

| ISM frequency | Tolerance |
| --- | --- |
| 6.78 MHz | ± 15.0 kHz |
| 13.56 MHz | ± 7.0 kHz |
| 27.12 MHz | ± 163.0 kHz |
| 40.68 MHz | ± 20.0 kHz |
| 915 MHz | ± 13.0 MHz |
| 2450 MHz | ± 50.0 MHz |
| 5800 MHz | ± 75.0 MHz |
| 24.125 GHz | ± 125.0 MHz |
| 61.25 GHz | ± 250.0 MHz |
| 122.50 GHz | ± 500.0 MHz |
| 245.00 GHz | ± 1.0 GHz |

[85 FR 38740, June 26, 2020]