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.

1 problem found

16 passed · 4 suggestions · 1 problems

What is being checked

info: KRCG-FM - SANTA ROSA, CA
From the NRSC list: 91.10 MHz, PI code 3D1E, FCC facility 57946.
info: RadioDNS lookup name
09110.3d1e.3a0.fm.radiodns.org (frequency 91.10 MHz, PI 3D1E, country code 3a0)

1. RadioDNS registration

pass: Registered
09110.3d1e.3a0.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
405 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: KRCB 104.9
Matched on bearer fm:3a0.3d1e.09110
pass: Short name: KRCB
pass: Medium name: KRCB 104.9
pass: Long name: KRCB 104.9 Sonoma County's NPR Station
pass: Short description present
KRCB 104.9 listener-supported, commercial free public radio featuring local and NPR News, locally curated music shows along with original and nationally syndicated content
pass: Long description present
KRCB 104.9 is local, listener-supported, commercial free public radio featuring local and NPR News, locally curated music shows along with original and nationally syndicated content.
info: No keywords
Optional.
pass: 1 link
https://norcalpublicmedia.org/radio/radio
pass: The <radiodns> element matches the registration
fqdn radiodns.prss.org, service identifier 0000000000000431

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.
info: Logo checks limited
Only the first logos were fetched.
pass: 12 logos downloaded and checked

Declared	Actual	Size	Result
320x240	320x240	9,768 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963944.png
112x32	112x32	481 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963946.png
74x41	74x41	575 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963866.png
170x170	170x170	5,347 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963938.png
288x162	288x162	5,358 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963942.png
600x600	600x600	28,723 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963932.png
1024x768	1024x768	33,108 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963930.png
1600x1200	1600x1200	38,259 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963948.png
220x48	220x48	869 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963858.png
86x48	86x48	778 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963864.png
160x90	160x90	2,070 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963952.png
1920x1080	1920x1080	38,762 B	OK http://radiodns.prss.org/radiodns/spi/3.3/si/img/KRCB-NPR-LogoSquare600x600_169963950.png

6. Transmitters and streams

info: Other bearer: fm:3a0.3d19.10490
Not checked by this tool.
pass: FM bearer fm:3a0.3d1e.09110
cost 20
fail: Stream not reachable: https://amber.streamguys1.com:5545/live
Port 5545 is not one this checker will connect to (allowed: 80, 443, 8080, 8443)
What to do: Receivers switch to this stream when FM fades; it must be reachable.

Check another station Link to this result Download as JSON

Checked 2026-10-20T21:09:42+00:00 (UTC) from the lookup name 09110.3d1e.3a0.fm.radiodns.org.

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