AS23456 is currently announcing a good few netblocks (which don't have a very good smtp reputation, by the way).
Funny thing is, that's a special use ASN as per rfc4893, something about two octet ASNs that don't have a four octet representation. Only one upstream (airtelbroadband-as-ap, as24560) that I can see > > 103.7.204.0/22 > > 103.14.208.0/22 > > 103.23.124.0/22 > > 103.30.12.0/22 > > 103.245.112.0/22 > > 111.235.148.0/22 > > 177.55.249.0/24 > > 186.251.192.0/21 --srs (htc one x)

