9 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
DMARC rf= tag for a domain: report format. Reads _dmarc.<domain> (Cloudflare DoH), parses the record and returns the rf value (or that it is absent, with the default that then applies) plus the full record. Precise singl...
Change watch for dmarc tag rf: runs the check, compares it with the result from your previous call for the same domain (kept 90 days) and returns the current answer, changed true/false, the fields that changed with befor...
RF band catalogue search: given a frequency or band name fragment, returns every matching band with range, region, uses and legality.
LoRaWAN regional channel plan: uplink/downlink frequencies, bandwidth, duty-cycle and power limits for US915, EU868, AS923 or worldwide summary.
RF legality check: country + frequency (+ optional power) returns whether the band is licence-free, the power and duty-cycle limits, and the governing rule for US, EU, JP or CN.
RF link budget: transmit power, antenna gains, cable loss, frequency and distance return path loss, received power, link margin, max range and first Fresnel radius.
Sub-GHz band plan by country (US, EU, JP, CN): every allocated range with service name and access conditions, as a single machine-readable table.
Sub-GHz RF band lookup: given a frequency in MHz, returns the band, region, common uses and legality notes.
RF unit converter: dBm, mW, W, uV, mV and V at a given impedance, plus wavelength, half-wave and quarter-wave elements when a frequency is supplied.