Calling and Simplex Frequencies -- From 160M To Daylight

Considerate Operator's Freq Guide - Who's Operating Where? - Or Should Be -- Includes DX Windows

ITU Regions -- From The ITU

4U1ITU Band Plans & ITU Regions (3)

Part 97 -- From The ARRL

Modulation Types -- AM, SSB, FM, Pulse, etc

Modulation Types -- From The ITU -- Authorized frequency bands, Frequency sharing requirements, Authorized emission types, Emission standards, RTTY and data emission codes, SS emission types.

Repeater Band Plans, USA -- From SHARKK

Repeater Guides -- World Wide -- From Alaska To Zimbabwe

FREQUENCIES -- DC TO DAYLIGHT

Aviation

AirNav Homepage -- Loaded with Aviation Frequencies, Articles, Software -- much more

Airport Information --By identifier or city/state

Aeronautical Radio Broadcast -- From William Hepburn

Air Navigation Database -- Worldwide

NAVAID Frequencies -- US Aviation NDBs Data Base

Aviation Radio Service -- From The FCC

General Aviation Frequencies

VOR Lookup -- From The NavAid Pages

VOR Information -- Describes VOR instrument approaches

National Weather Service (NOAA) -- Marine Home Page

Mega Frequency List - Bill McFadden's Frequency Lists -- From nearly DC to Daylight!! Emergency, Distress, Goverment, Commercial, Maritime, Time Standards, SW Bands, Scanner Frequencies -- THE WORKS!! Has 10 Different Lists

Frequency Classifications -- ELF thru EHF (HF & VHF Too!!)

Frequency Allocation Chart -- Also Ordering info for a Wall Chart

Frequencies A Bunch -- From Durham Radio

Cellular Phone Frequencies

Frequencies A Bunch -- Airphone, CAP, Cordless Phone, Federal Agency, Railroad Frequencies

Frequency Allocation Charts -- Includes USA Frequency Allocations, Canadian Frequency Allocation Chart, U.S. radio spectrum 30 MHz-300 GHz, Land Mobile Frequency Chart