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

14 passed · 6 suggestions · 0 problems

What is being checked

info: WSIU - CARBONDALE, IL
From the NRSC list: 91.90 MHz, PI code 8514, FCC facility 61309.
info: RadioDNS lookup name
09190.8514.8a0.fm.radiodns.org (frequency 91.90 MHz, PI 8514, country code 8a0)

1. RadioDNS registration

pass: Registered
09190.8514.8a0.fm.radiodns.org points to the station's authoritative domain: radiodns.prss.org

2. Service discovery (SRV records)

info: _radiospi._tcp.radiodns.prss.org: not published
pass: _radioepg._tcp.radiodns.prss.org published
priority 10, weight 60, port 80 -> radiodns.prss.org [target is an alias of contentdepot.prss.org]
warn: SRV target radiodns.prss.org is a CNAME alias
DNS rules (RFC 2782) say an SRV record should point at a name that has address records directly, not at an alias. Many resolvers cope, some do not.
What to do: Give radiodns.prss.org its own A/AAAA record (or point the SRV record at the real host name).
warn: Only the older _radioepg record is published
What to do: Add _radiospi._tcp.radiodns.prss.org on port 443 as well, so receivers that use HTTPS can find the SI file.
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: HTTP endpoint http://radiodns.prss.org/radiodns/spi/3.1/SI.xml answered
350 ms, 261,375 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.
pass: The file follows the official SI schema (current (3.4/3.5))
Validated against the schema published by WorldDAB/RadioDNS.

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

4. Your station in the file

info: 76 services in the file
pass: Station found: Pro Audio P1 (l)
Matched on bearer fm:8a0.8514.09190
warn: No short name (up to 8 characters)
What to do: Receivers show these names; add both.
pass: Medium name: Pro Audio P1 (l)
pass: Long name: Pro Audio 1 Port 1 (legacy)
warn: No short description
What to do: Add a one-sentence description (up to 180 characters).
pass: Long description present
A Broadcast Service of Southern Illinois University at Carbondale
info: No keywords
Optional.
pass: 1 link
https://news.wsiu.org
pass: The <radiodns> element matches the registration
fqdn radiodns.prss.org, service identifier 0000000000000c1d

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: 7 logos downloaded and checked

Declared	Actual	Size	Result
128x128	128x128	5,060 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/139109468_wsiu%20web%20logo%202.jpg
32x32	32x32	1,137 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/139109464_wsiu%20web%20logo%202.jpg
600x600	600x600	43,654 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/139109460_wsiu%20web%20logo%202.jpg
112x32	112x32	1,218 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/139109472_wsiu%20web%20logo%202.jpg
320x240	320x240	12,966 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/139109108_wsiu%20web%20logo%202.jpg
600x600	600x600	46,099 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/139109516_wsiu%20web%20logo%202.jpg
170x170	170x170	7,359 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/139109112_wsiu%20web%20logo%202.jpg

6. Transmitters and streams

pass: FM bearer fm:8a0.8514.09190
cost 20
info: No internet stream listed
Optional, but without one receivers cannot switch from FM to an online stream.

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Checked 2026-10-20T21:16:02+00:00 (UTC) from the lookup name 09190.8514.8a0.fm.radiodns.org.

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