EARFCN uses a band-specific offset
LTE downlink and uplink channels use 100 kHz steps with offsets defined for each E-UTRA band. The same frequency may produce different candidates across overlapping bands.
Direction matters for FDD bands
In FDD operation, uplink and downlink use separate frequency ranges and EARFCN blocks. TDD bands use a shared range, so direction does not create a paired frequency.
Specification basis and practical use
The calculator uses E-UTRA band data from 3GPP TS 36.101 V18.7.0. A valid EARFCN confirms a standards mapping, not that a specific operator deploys it locally.
Frequently asked questions
What frequency is EARFCN 1650?
EARFCN 1650 maps to 1850 MHz downlink in LTE band 3.
Can one MHz value match several LTE bands?
Yes. Some E-UTRA bands overlap, so direction and the selected regional deployment are important.
What is the difference between EARFCN and NR-ARFCN?
EARFCN identifies LTE E-UTRA channels, while NR-ARFCN uses the 5G NR global frequency raster.