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]R2.12.00/of:Nov 21 2019 Date: Sat, 14 June 2025 15:13:13 UTC Content-Type: text/plain Content-Length: 129 STR;SEIERSTAD;;;;;;SNIP;XXX;0.00;0.00;0;0;sNTRIP;none;B;N;0;none; NET;SNIP;;B;N;None;192.168.1.200:5000;None;; ENDSOURCETABLE
If this Caster is on a public IP, your can decode it at SNIP's NTRIP Caster Table page
This is a CLOSED NTRIP Caster, you must has a user account and password to access it.