Summary

ASN	AS1221 Telstra Limited
BGP	203.48.0.0/14
IPs with RDNS	63
Hosted Domains	0
Pingable IPs	20
Router IPs	12


203.50.12.0	—	0
203.50.12.1	serial3-1-1.ken-core5.sydney.telstra.net	0
203.50.12.2	—	0
203.50.12.3	—	0
203.50.12.4	—	0
203.50.12.5	pos2-0.ken-core5.sydney.telstra.net	0
203.50.12.6	—	0
203.50.12.7	—	0
203.50.12.8	—	0
203.50.12.9	pos5-0.chw-core3.sydney.telstra.net	0
203.50.12.10	—	0
203.50.12.11	—	0
203.50.12.12	—	0
203.50.12.13	—	0
203.50.12.14	pos2-0.chw-core3.sydney.telstra.net	0
203.50.12.15	—	0
203.50.12.16	bundle-ether30.stl-core30.sydney.telstra.net	0
203.50.12.17	bundle-ether1.chw-dlr20.sydney.telstra.net	0
203.50.12.18	bundle-ether30.hay-core30.sydney.telstra.net	0
203.50.12.19	bundle-ether1.ken-dlr20.sydney.telstra.net	0
203.50.12.20	tengige0-0-2-1.bwy-edge701.sydney.telstra.net	0
203.50.12.21	tengige0-0-2-1.bwy-edge702.sydney.telstra.net	0
203.50.12.22	tengige0-0-2-1.ken-edge702.sydney.telstra.net	0
203.50.12.23	tengige0-0-2-1.chw-edge702.sydney.telstra.net	0
203.50.12.24	tengigabitethernet0-0-2-1.stl-edge701.sydney.telstra.net	0
203.50.12.25	tengigabitethernet0-0-2-1.stl-edge702.sydney.telstra.net	0
203.50.12.26	—	0
203.50.12.27	—	0
203.50.12.28	tengigabitethernet0-0-2-1.ult-edge701.sydney.telstra.net	0
203.50.12.29	tengigabitethernet0-0-2-1.ult-edge702.sydney.telstra.net	0
203.50.12.30	tengigabitethernet0-0-2-1.chw-edge701.sydney.telstra.net	0
203.50.12.31	tengigabitethernet0-0-2-1.ken-edge701.sydney.telstra.net	0
203.50.12.32	—	0
203.50.12.33	serial4-1-1.ken-core5.sydney.telstra.net	0
203.50.12.34	—	0
203.50.12.35	—	0
203.50.12.36	ae1.por-edge411.melbourne.telstra.net	0
203.50.12.37	ae1.por-edge421.melbourne.telstra.net	0
203.50.12.38	ae1.por-edge412.melbourne.telstra.net	0
203.50.12.39	ae1.por-edge422.melbourne.telstra.net	0
203.50.12.40	—	0
203.50.12.41	—	0
203.50.12.42	gigabitethernet0-2.pad24.sydney.telstra.net	0
203.50.12.43	gigabitethernet0-2.pad25.sydney.telstra.net	0
203.50.12.44	—	0
203.50.12.45	serial3-0.ken-core6.sydney.telstra.net	0
203.50.12.46	—	0
203.50.12.47	—	0
203.50.12.48	—	0
203.50.12.49	serial5-1-1.ken-core5.sydney.telstra.net	0
203.50.12.50	—	0
203.50.12.51	—	0
203.50.12.52	—	0
203.50.12.53	serial5-6-1.ken-core5.sydney.telstra.net	0
203.50.12.54	tengige0-0-2-1.pit-edge701.sydney.telstra.net	0
203.50.12.55	tengige0-0-2-1.pit-edge702.sydney.telstra.net	0
203.50.12.56	—	0
203.50.12.57	serial6-3-1.ken-core5.sydney.telstra.net	0
203.50.12.58	—	0
203.50.12.59	—	0
203.50.12.60	—	0
203.50.12.61	—	0
203.50.12.62	—	0
203.50.12.63	—	0
203.50.12.64	—	0
203.50.12.65	—	0
203.50.12.66	—	0
203.50.12.67	—	0
203.50.12.68	—	0
203.50.12.69	—	0
203.50.12.70	—	0
203.50.12.71	—	0
203.50.12.72	—	0
203.50.12.73	—	0
203.50.12.74	—	0
203.50.12.75	—	0
203.50.12.76	—	0
203.50.12.77	—	0
203.50.12.78	—	0
203.50.12.79	—	0
203.50.12.80	—	0
203.50.12.81	serial5-4-1.ken-core5.sydney.telstra.net	0
203.50.12.82	—	0
203.50.12.83	—	0
203.50.12.84	—	0
203.50.12.85	serial6-0-1.ken-core5.sydney.telstra.net	0
203.50.12.86	—	0
203.50.12.87	—	0
203.50.12.88	—	0
203.50.12.89	—	0
203.50.12.90	—	0
203.50.12.91	—	0
203.50.12.92	—	0
203.50.12.93	serial5-5-1.ken-core5.sydney.telstra.net	0
203.50.12.94	—	0
203.50.12.95	—	0
203.50.12.96	—	0
203.50.12.97	serial6-1-1.ken-core5.sydney.telstra.net	0
203.50.12.98	—	0
203.50.12.99	—	0
203.50.12.100	—	0
203.50.12.101	serial3-0.chw-core4.sydney.telstra.net	0
203.50.12.102	—	0
203.50.12.103	—	0
203.50.12.104	bundle-ether4.ken-edge901.sydney.telstra.net	0
203.50.12.105	—	0
203.50.12.106	bundle-ether4.ken-edge902.sydney.telstra.net	0
203.50.12.107	—	0
203.50.12.108	bundle-ether4.chw-edge901.sydney.telstra.net	0
203.50.12.109	—	0
203.50.12.110	bundle-ether4.chw-edge902.sydney.telstra.net	0
203.50.12.111	—	0
203.50.12.112	—	0
203.50.12.113	—	0
203.50.12.114	—	0
203.50.12.115	—	0
203.50.12.116	—	0
203.50.12.117	—	0
203.50.12.118	—	0
203.50.12.119	—	0
203.50.12.120	—	0
203.50.12.121	—	0
203.50.12.122	—	0
203.50.12.123	—	0
203.50.12.124	—	0
203.50.12.125	gigabitethernet0-3.ken-core7.sydney.telstra.net	0
203.50.12.126	—	0
203.50.12.127	gigabitethernet0-3.chw-core4.sydney.telstra.net	0
203.50.12.128	—	0
203.50.12.129	—	0
203.50.12.130	bundle-ether50.hay-core30.sydney.telstra.net	0
203.50.12.131	ae0.alx-edge411.sydney.telstra.net	0
203.50.12.132	bundle-ether50.stl-core30.sydney.telstra.net	0
203.50.12.133	ae0.alx-edge421.sydney.telstra.net	0
203.50.12.134	ae1.alx-edge411.sydney.telstra.net	0
203.50.12.135	ae1.alx-edge421.sydney.telstra.net	0
203.50.12.136	—	0
203.50.12.137	—	0
203.50.12.138	—	0
203.50.12.139	—	0
203.50.12.140	—	0
203.50.12.141	gigabitethernet0-17.ham3.newcastle.telstra.net	0
203.50.12.142	—	0
203.50.12.143	gigabitethernet0-17.ham2.newcastle.telstra.net	0
203.50.12.144	—	0
203.50.12.145	serial6-2-1.ken-core5.sydney.telstra.net	0
203.50.12.146	—	0
203.50.12.147	—	0
203.50.12.148	—	0
203.50.12.149	—	0
203.50.12.150	—	0
203.50.12.151	—	0
203.50.12.152	—	0
203.50.12.153	—	0
203.50.12.154	—	0
203.50.12.155	—	0
203.50.12.156	—	0
203.50.12.157	serial1-0.ken-core7.sydney.telstra.net	0
203.50.12.158	—	0
203.50.12.159	—	0
203.50.12.160	—	0
203.50.12.161	serial5-0.chw-core4.sydney.telstra.net	0
203.50.12.162	—	0
203.50.12.163	—	0
203.50.12.164	—	0
203.50.12.165	—	0
203.50.12.166	—	0
203.50.12.167	—	0
203.50.12.168	—	0
203.50.12.169	—	0
203.50.12.170	—	0
203.50.12.171	—	0
203.50.12.172	—	0
203.50.12.173	—	0
203.50.12.174	—	0
203.50.12.175	—	0
203.50.12.176	—	0
203.50.12.177	—	0
203.50.12.178	—	0
203.50.12.179	—	0
203.50.12.180	—	0
203.50.12.181	—	0
203.50.12.182	—	0
203.50.12.183	gigabitethernet0-3.chw-core3.sydney.telstra.net	0
203.50.12.184	bundle-ether1.dub6.dubbo.telstra.net	0
203.50.12.185	—	0
203.50.12.186	—	0
203.50.12.187	—	0
203.50.12.188	gigabitethernet0-19.dub6.dubbo.telstra.net	0
203.50.12.189	—	0
203.50.12.190	—	0
203.50.12.191	—	0
203.50.12.192	—	0
203.50.12.193	—	0
203.50.12.194	gigabitethernet0-18.wol2.wollongong.telstra.net	0
203.50.12.195	gigabitethernet0-18.wol1.wollongong.telstra.net	0
203.50.12.196	—	0
203.50.12.197	—	0
203.50.12.198	—	0
203.50.12.199	—	0
203.50.12.200	bundle-ether2.ham3.newcastle.telstra.net	0
203.50.12.201	bundle-ether2.ham2.newcastle.telstra.net	0
203.50.12.202	—	0
203.50.12.203	—	0
203.50.12.204	—	0
203.50.12.205	—	0
203.50.12.206	—	0
203.50.12.207	—	0
203.50.12.208	—	0
203.50.12.209	—	0
203.50.12.210	—	0
203.50.12.211	—	0
203.50.12.212	—	0
203.50.12.213	—	0
203.50.12.214	—	0
203.50.12.215	—	0
203.50.12.216	—	0
203.50.12.217	serial1-1.ken-core6.sydney.telstra.net	0
203.50.12.218	—	0
203.50.12.219	—	0
203.50.12.220	—	0
203.50.12.221	—	0
203.50.12.222	—	0
203.50.12.223	—	0
203.50.12.224	—	0
203.50.12.225	—	0
203.50.12.226	—	0
203.50.12.227	—	0
203.50.12.228	—	0
203.50.12.229	—	0
203.50.12.230	—	0
203.50.12.231	—	0
203.50.12.232	—	0
203.50.12.233	—	0
203.50.12.234	—	0
203.50.12.235	—	0
203.50.12.236	—	0
203.50.12.237	—	0
203.50.12.238	—	0
203.50.12.239	—	0
203.50.12.240	—	0
203.50.12.241	—	0
203.50.12.242	—	0
203.50.12.243	—	0
203.50.12.244	gigabitethernet0-3.ken-core5.sydney.telstra.net	0
203.50.12.245	—	0
203.50.12.246	gigabitethernet0-3.chw-core5.sydney.telstra.net	0
203.50.12.247	—	0
203.50.12.248	—	0
203.50.12.249	—	0
203.50.12.250	—	0
203.50.12.251	—	0
203.50.12.252	—	0
203.50.12.253	—	0
203.50.12.254	—	0
203.50.12.255	—	0

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

$ traceroute -a -n -q1 -f2 203.50.12.133

traceroute to 203.50.12.133 (203.50.12.133): 64 hops max, 52 byte packets

2 [] 156.146.32.186 0.18 ms

3 [AS1221] 203.50.12.133 0.421 ms

Measurement taken from

IPinfo ProbeNet in Sydney, AU

On March 13, 2026