You may perform this lookup using the API and get the results as easy-to-parse JSON data.
Read more on the API at https://iamroot.tech/about/api (regarding authentication and rate limits, among other things), or give it a go right away using the 'try it' button.
Checking 104.255.56.0 against spamcop. Not listed (NotExistentDomain). 43ms
067
+066
Checking 104.255.56.0 against Spamhaus ZEN. Not listed (NotExistentDomain). 65ms
103
+036
Checking 104.255.56.0 against Barracuda Central. Not listed (NotExistentDomain). 36ms
147
+044
Checking 104.255.56.0 against PSBL (Passive Spam Block List). Not listed (NotExistentDomain). 43ms
191
+000
Checking 104.255.56.0 against SURBL (multi). Not listed (NotExistentDomain). 189ms
206
+058
Checking 104.255.56.0 against GBUdb. Not listed (NotExistentDomain). 58ms
218
+000
Checking 104.255.56.0 against UCEPROTECT lvl 2. Not listed (NotExistentDomain). 98ms
264
+059
Checking 104.255.56.0 against ips.backscatterer.org. Not listed (NotExistentDomain). 58ms
502
+457
Checking 104.255.56.0 against Spamrats!. Error: ServerFailure. 456ms
1.236
+1.045
Checking 104.255.56.0 against SORBS. Not listed (NotExistentDomain). 1.044ms
1.349
+113
Checking 104.255.56.0 against Junk Email Filter (tm). Not listed (NotExistentDomain). 112ms
1.431
+1.167
Done
1.431
+000
11 DNSBL's checked in 1.430ms.
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