`jisc-vn.com`

DNSSEC	⚠️ Not signed
A	51.79.145.139^{🇸🇬 OVH51.79.128.0/17 Hosting route}
		PTR	`vps-7ae13ac2.vps.ovh.ca`
NS	`ns1.vdconline.vn` ⭐
		A	14.225.41.137^{🇻🇳 VNPT-AS-VN14.225.41.0/24 VNPT}
			PTR	`static.vnpt.vn`
NS	`ns2.vdconline.vn`
		A	14.225.197.109^{🇻🇳 VNPT-AS-VN14.225.197.0/24 VNPT}
			PTR	`static.vnpt.vn`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4023:c06::1b^{🇺🇸 Google2607:f8b0::/32}
			PTR	`dz-in-f27.1e100.net`
		A	142.250.141.27^{🇺🇸 Google142.250.141.0/24}
			PTR	`dd-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2607:f8b0:4023:1015::1a^{🇺🇸 Google2607:f8b0::/32}
			PTR	`yudfwta-in-f26.1e100.net`
		A	172.253.135.27^{🇺🇸 Google172.253.135.0/24}
			PTR	`yudfwta-in-f27.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1a^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f26.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c00::1b^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`ws-in-f27.1e100.net`
			PTR	`ws-in-x1b.1e100.net`
		A	173.194.76.26^{🇺🇸 Google173.194.76.0/24}
			PTR	`ws-in-f26.1e100.net`
TXT	`v=spf1 include:_spf.google.com ~all`
TXT	`v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCl1Vsx9AyMZIxw19omt3s...`
SOA	`ns1.vdconline.vn`vdconline@tld 2025-11-08 #19

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1775968357

Subdomains

mail.jisc-vn.com

Same first word

jisc-vn.com

DNS History

11 records (8 active, 3 former)

●NSns1.vdconline.vn2015-08-10 → 2026-04-12 · 2 obs

● 2015-08-10 12:20:10
● 2026-04-12 04:35:28

●NSns2.vdconline.vn2015-08-10 → 2026-04-12 · 2 obs

● 2015-08-10 12:20:10
● 2026-04-12 04:35:28

●MXalt1.aspmx.l.google.com2026-03-09 → 2026-04-12 · 3 obs

○ 2017-04-03 07:10:56
● 2026-03-09 07:59:48
● 2026-04-12 04:35:28

●MXalt2.aspmx.l.google.com2026-03-09 → 2026-04-12 · 3 obs

○ 2017-04-03 07:10:56
● 2026-03-09 07:59:48
● 2026-04-12 04:35:28

●MXalt3.aspmx.l.google.com2026-03-09 → 2026-04-12 · 3 obs

○ 2017-04-03 07:10:56
● 2026-03-09 07:59:48
● 2026-04-12 04:35:28

●MXalt4.aspmx.l.google.com2026-03-09 → 2026-04-12 · 3 obs

○ 2017-04-03 07:10:56
● 2026-03-09 07:59:48
● 2026-04-12 04:35:28

●MXaspmx.l.google.com2026-03-09 → 2026-04-12 · 3 obs

○ 2017-04-03 07:10:56
● 2026-03-09 07:59:48
● 2026-04-12 04:35:28

○MXmail.jisc-vn.com2015-08-10 → 2017-04-03 · 4 obs

● 2015-08-10 12:20:10
● 2017-04-03 07:10:56
○ 2026-03-09 07:59:48
○ 2026-04-12 04:35:28

○A101.99.20.1662015-08-10 → 2016-06-19 · 4 obs

● 2015-08-10 12:20:10
● 2016-06-19 07:04:58
○ 2017-04-03 07:10:56
○ 2026-04-12 04:35:28

○A42.112.38.1902017-04-03 → 2017-04-03 · 4 obs

○ 2016-06-19 07:04:58
● 2017-04-03 07:10:56
○ 2026-03-09 07:59:48
○ 2026-04-12 04:35:28

●A51.79.145.1392026-03-09 → 2026-04-12 · 3 obs

○ 2017-04-03 07:10:56
● 2026-03-09 07:59:48
● 2026-04-12 04:35:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	m.gtld-servers.net, i.gtld-servers.net, k.gtld-servers.net, e.gtld-servers.net...	-
jisc-vn.com	ns1.vdconline.vn, ns2.vdconline.vn	-

✅ Authoritative Response

Server:14.225.41.137

NS records: ns1.vdconline.vn, ns2.vdconline.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jisc-vn.com (unsigned zone)

⏱️ Timing

Total: 1506ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`51.79.145.139`
NS	2	`ns2.vdconline.vn, ns1.vdconline.vn`
MX	5	`alt4.aspmx.l.google.com (pri: 10), alt2.aspmx.l.google.com (pri: 5)...`
TXT	2	`v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQ, v=spf1 include:_spf.google.com ~all`
SOA	1	`ns1.vdconline.vn vdconline.tld`

Analysis

Hierarchy

The parent of mail.jisc-vn.com is jisc-vn.com.

IP Addresses

jisc-vn.com points to a single IP: 51.79.145.139.

Other host names, for instance hoc-trang-diem-chuyen-nghiep-ha-noi.tuarts.net, tuart.net, mail.giasusupham.com.vn, anh-vien-ao-cuoi-uy-tin-tai-ha-noi.tuarts.net and skr.vn share IP numbers with jisc-vn.com.

Name Servers

Two name servers ns1.vdconline.vn and ns2.vdconline.vn handle delegation for jisc-vn.com.

jisc-vn.com uses the same name server setup as other domains, for example vinaren.vn, eveline.com.vn, tvh.com.vn, apvn.info and tinhuyhaiduong.vn.

jisc-vn.com shares name servers with other domains at least partially, for instance ledunghotel.com.vn, kplus.vn and mnhoatien2-hoavang.edu.vn.

These name servers are often used with the name servers ns3.vdc3.vn and ns4.vdc3.vn.

Host names with one IP number: The host name ns1.vdconline.vn points to 14.225.41.137 and the host name ns2.vdconline.vn points to 14.225.197.109.