Because you requested the table using a browser (rather then an NTRIP Client) it has been returned to you as an HTML page.
SOURCETABLE 200 OK Server: SubCarrier Systems Corp SNIP simpleNTRIP_Caster_[wLITE]R3.15.14/of:Aug 14 2024 Date: Sat, 05 October 2024 02:17:34 UTC Content-Type: text/plain Content-Length: 845 STR;APEL00NLD0;Apeldoorn;RTCM 3.3;1006(15),1008(15),1013(60),1019(900),1033(15),1042(900),1045(100),1046(180),1077(1),1087(1),1097(1),1127(1),1230(15);2;GPS+GLO+GAL+BDS+QZS;AGRS.NL;NLD;52.21;5.96;0;0;sNTRIP;none;B;N;18400; STR;Demo1;Auckland;RTCM 3.2;1006(10),1008(10),1013(10),1033(10),1042(5),1044(32),1045(10),1046(10),1074(1),1084(1),1094(1),1114(1),1124(1),1230(10);2;GPS+GLO+GAL+BDS+QZS;IGS;NZL;-36.60;174.83;1;0;sNTRIP;none;B;N;8580;cgps-streaming.geonet.org.nz:8888/AUCK_RTCM(1) STR;KOS100NLD0;Radio-Kootwijk;RTCM 3.3;1006(15),1008(15),1019(60),1020(60),1033(15),1042(60),1045(60),1046(60),1077(1),1087(1),1097(1),1107(1),1117(1),1127(1),1137(1),1230(15);2;GPS+GLO+GAL+BDS+QZS+IRS+SBAS;AGRS.NL;NLD;52.17;5.82;0;0;sNTRIP;none;B;N;22980;gnss1.tudelft.nl:2101/KOS100NLD0(1) NET;SNIP;;B;N;None;192.168.178.57:2101;None;; ENDSOURCETABLE
This Caster is being hosted on a private IP.
For Casters on a public IP, you can decode them with SNIP's NTRIP Caster Table Decoder page
[You can press the 'View All' button to see the Base Stations displayed on a map.]
This is a CLOSED NTRIP Caster, you must has a user account and password to access it.