Looing at traces from USA or UK, it looks like sentech just uses IS for international connectivity. Wonder if they actually do use any of their own infrastructure for international access to internet?
1 POS3-3.BR1.LND9.ALTER.NET (146.188.68.209) [AS702 {ALTERNET}] 0 msec 4 msec 0 msec
2 so-0-2-0.TR2.LND9.ALTER.NET (146.188.7.245) [AS702 {ALTERNET}] 0 msec 0 msec 0 msec
3 so-6-1-0.TR1.LND2.ALTER.NET (146.188.4.81) [AS702 {ALTERNET}] 0 msec 0 msec 4 msec
4 so-5-0-0.XR2.LND2.ALTER.NET (146.188.7.229) [AS702 {ALTERNET}] 0 msec 0 msec 0 msec
5 158.43.233.245 [AS702 {ALTERNET}] 0 msec 0 msec 0 msec
6 fe8-0-0.gw13.lnd5.gbb.uk.uu.net (158.43.157.141) [AS702 {ALTERNET}] 0 msec 0 msec 0 msec
7 Internet-Solutions-gw.customer.ALTER.NET (146.188.58.162) [AS702 {ALTERNET}] 4 msec 0 msec 4 msec
8 168.209.247.158 [AS3741 {IS}] 0 msec 4 msec 0 msec
9 168.209.100.30 [AS3741 {IS}] 76 msec 76 msec 72 msec
10 168.209.0.85 [AS3741 {IS}] 496 msec 404 msec 408 msec
11 isl.nmszone.is.co.za (196.26.0.3) [AS3741 {IS}] 408 msec 408 msec 408 msec
12 168.209.18.62 [AS3741 {IS}] 404 msec 400 msec 324 msec
13 gige-0-0-21.rtr-core4-stp.infosat.net (66.18.65.222) [AS22572 {INFOSAT-IP}] 332 msec 332 msec 328 msec
14 pf-hosting1b-stp.infosat.net (66.18.67.203) [AS22572 {INFOSAT-IP}] 344 msec 340 msec 348 msec
15 pf-hosting1b-stp.infosat.net (66.18.67.203) [AS22572 {INFOSAT-IP}] !unreachable !unreachable !unreachable
1 POS3-3.BR1.LND9.ALTER.NET (146.188.68.209) [AS702 {ALTERNET}] 0 msec 4 msec 0 msec
2 so-0-2-0.TR2.LND9.ALTER.NET (146.188.7.245) [AS702 {ALTERNET}] 0 msec 0 msec 0 msec
3 so-6-1-0.TR1.LND2.ALTER.NET (146.188.4.81) [AS702 {ALTERNET}] 0 msec 0 msec 4 msec
4 so-5-0-0.XR2.LND2.ALTER.NET (146.188.7.229) [AS702 {ALTERNET}] 0 msec 0 msec 0 msec
5 158.43.233.245 [AS702 {ALTERNET}] 0 msec 0 msec 0 msec
6 fe8-0-0.gw13.lnd5.gbb.uk.uu.net (158.43.157.141) [AS702 {ALTERNET}] 0 msec 0 msec 0 msec
7 Internet-Solutions-gw.customer.ALTER.NET (146.188.58.162) [AS702 {ALTERNET}] 4 msec 0 msec 4 msec
8 168.209.247.158 [AS3741 {IS}] 0 msec 4 msec 0 msec
9 168.209.100.30 [AS3741 {IS}] 76 msec 76 msec 72 msec
10 168.209.0.85 [AS3741 {IS}] 496 msec 404 msec 408 msec
11 isl.nmszone.is.co.za (196.26.0.3) [AS3741 {IS}] 408 msec 408 msec 408 msec
12 168.209.18.62 [AS3741 {IS}] 404 msec 400 msec 324 msec
13 gige-0-0-21.rtr-core4-stp.infosat.net (66.18.65.222) [AS22572 {INFOSAT-IP}] 332 msec 332 msec 328 msec
14 pf-hosting1b-stp.infosat.net (66.18.67.203) [AS22572 {INFOSAT-IP}] 344 msec 340 msec 348 msec
15 pf-hosting1b-stp.infosat.net (66.18.67.203) [AS22572 {INFOSAT-IP}] !unreachable !unreachable !unreachable