Is your station ready for hybrid radio?

RadioDNS lets connected car radios and receivers show your logo, name and stream. This free checker follows the same steps a receiver does and tells you, in plain English, what works and what to fix.

Working, with 6 suggestions

16 passed · 6 suggestions · 0 problems

What is being checked

info: KZLF - ALVA, OK
From the NRSC list: 97.50 MHz, PI code 5327, FCC facility 85771.
info: RadioDNS lookup name
09750.5327.5a0.fm.radiodns.org (frequency 97.50 MHz, PI 5327, country code 5a0)

1. RadioDNS registration

pass: Registered
09750.5327.5a0.fm.radiodns.org points to the station's authoritative domain: kzlf.net

2. Service discovery (SRV records)

pass: _radiospi._tcp.kzlf.net published
priority 0, weight 0, port 443 -> kzlf.net
pass: _radioepg._tcp.kzlf.net published
priority 0, weight 0, port 80 -> kzlf.net
info: _radiovis._tcp: not published
Slideshow/visuals (STOMP) - optional, only needed for a live slideshow service.
info: _radiopush._tcp: not published
Slideshow/visuals (Server-Sent Events) - optional, only needed for a live slideshow service.
info: _radiovis-http._tcp: not published
Slideshow/visuals (HTTP) - optional, only needed for a live slideshow service.

3. Service Information file (SI.xml)

pass: HTTPS endpoint https://kzlf.net/radiodns/spi/3.1/SI.xml answered
80 ms, 3,472 bytes
pass: The HTTPS certificate is valid
pass: Content type is application/xml
warn: SI file has no caching headers
What to do: Add Cache-Control: max-age (for example 86400 for 24 hours). Without it, receivers guess - and some ignore the content.
warn: The file does not strictly follow the official SI schema (3.1)
line 11: Element 'mediaDescription': This element is not expected.
line 37: Element 'mediaDescription': This element is not expected.
What to do: Many receivers are forgiving, but strict ones may ignore a file that does not match the schema. RadioDNS's SI tool (si.radiodns.org) can rebuild a correct file.
pass: HTTP endpoint http://kzlf.net/radiodns/spi/3.1/SI.xml answered
2 ms, 3,472 bytes
pass: Content type is application/xml
warn: SI file has no caching headers
What to do: Add Cache-Control: max-age (for example 86400 for 24 hours). Without it, receivers guess - and some ignore the content.
warn: The file does not strictly follow the official SI schema (3.1)
line 11: Element 'mediaDescription': This element is not expected.
line 37: Element 'mediaDescription': This element is not expected.
What to do: Many receivers are forgiving, but strict ones may ignore a file that does not match the schema. RadioDNS's SI tool (si.radiodns.org) can rebuild a correct file.

Guides: Make an SI file accessible (PDF) · Build an SI file with RadioDNS's tool

4. Your station in the file

info: 1 service in the file
pass: Station found: 97.5 KZLF
Matched on bearer fm:5a0.5327.09750
pass: Short name: 975 KZLF
pass: Medium name: 97.5 KZLF
info: No long name
Optional.
pass: Short description present
Your sanctuary from today's noise... Welcome back to the 80s!
info: No long description
Optional (up to 1200 characters).
info: No keywords
Optional.
info: No links
Optional: a website or contact link.
pass: The <radiodns> element matches the registration
fqdn kzlf.net, service identifier KZLF

5. Logos

pass: All five standard logo sizes are listed
warn: Logos have no caching headers
What to do: Add Cache-Control: max-age (for example 86400 for 24 hours). Without it, receivers guess - and some ignore the content.
pass: 5 logos downloaded and checked

Declared	Actual	Size	Result
32x32	32x32	1,263 B	OK https://kzlf.net/radiodns/logo32.jpg
112x32	112x32	2,811 B	OK https://kzlf.net/radiodns/logo112.jpg
128x128	128x128	5,198 B	OK https://kzlf.net/radiodns/logo128.jpg
320x240	320x240	11,494 B	OK https://kzlf.net/radiodns/logo320.jpg
600x600	600x600	26,938 B	OK https://kzlf.net/radiodns/logo600.jpg

6. Transmitters and streams

pass: FM bearer fm:5A0.5327.09750
cost 1
warn: Stream OK: http://listen.kzlf.net:80/stream
audio/mpeg, 128 kbps
The file says audio/mp3 but the stream answers audio/mpeg.
No offset set (optional): if the stream runs behind the broadcast, an offset in milliseconds lets receivers line the two up.

Check another station Link to this result Download as JSON

Checked 2026-10-19T17:35:37+00:00 (UTC) from the lookup name 09750.5327.5a0.fm.radiodns.org.

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