Ran into this while trying to locate active 400 mhz bands : r/RTLSDR
FCC Licensed Bands – Space Data
433 (400～475) MHz band-pass filter with ultra-small size, dedicated for SMA - Walmart.com
More bands in 400 MHz standardized by 3GPP - 450 MHz Alliance
The UHF Band
Amazon.com: Anina Vehicle Ham Mobile Radio Antenna Dual Band VHF UHF 136-174/400-470 MHZ with Lip Mount Fixed Bracket W/ PL259 Male to SO239 Female Extension 16.5ft RG58 Pure Copper Coaxial Cable :
Which Radio Frequency is Best Suited for Advanced Metering Infrastructure? | Making Connections
Measured output frequency operating in the 400-MHz band. | Download Scientific Diagram
 "The importance of 5G frequency spectrum | Reply")
The importance of 5G frequency spectrum | Reply
SAR of the antenna in three-layer tissue. (a) 400 MHz (MICS band). (b)... | Download Scientific Diagram
TANK ANTENNA 30-88 / 220-400 Mhz Bi-band VEHICULAR
Enhancing Wireless Access Technologies Using Multiple Frequency Bands to Enable the Widest Range of Internet of Things Applications | NTT Technical Review
Database of Frequency Allocations
Radio Scanner Guide - Part 3D: Military Aircraft
Multiband Transceiver STD-601 400 MHz
400 MHz Double 5/8 Wave Mobile Antenna | DPD Productions
China UHF Frequency Band 380-400 410-430MHz Diplexer,UHF Frequency Band 380- 400 410-430MHz Diplexer Manufacturers - Maniron
New EU Upper Frequency Band - atlasRFIDstore
Will the US gain first-mover advantage with new 5G frequency bands? | TelecomTV
Fujitsu TEN FM Transceiver 400MHz Band | eBay
