Posts Tagged ‘blacklisting’

While going through Spamhaus SBLs, I found this updated /23 under RIPE. It would seem that most times when Spamhaus is unsure of the exact ownership of a netblock or the downstream has a small number of IPs assigned to it, the volunteers will place it under the regional registry (RIR). I researched the IP […]


Good news for service provider Tata Communications (AS4755) and Spamhaus and some bad news for Tiscali (now Tinet – AS3257). For approximately a month, the large Indian-based provider, Tata Communications, has been still working on its SBL (Spamhaus Block List) by resolving its listings. This means the administrators at Tata Communications have been ending services […]


ASN stands for Autonomous System Number. AS or ASN followed by a number is used to identify an autonomous system on the internet by people who manage networks on the Internet. One well-known example of an ASN is AT&T whose is ASN7018. Most people who may be network engineers are concerned with ASNs. Also, netizens […]