`library-online.net`

DNSSEC	⚠️ Not signed
A	103.221.220.29^{🇻🇳 AZDIGI-AS-VN103.221.220.0/22 AZDIGI-VN}
NS	`nsbak.dotvndns.com` ⭐
		A	2406:9c80::9000:302^{🇻🇳 SUPERDATA2406:9c80::/48 -VN}
			PTR	`nsbak.dotvndns.com`
		A	112.213.89.22^{🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi}
			PTR	`ns8922.dotvndns.vn`
NS	`ns1.dotvndns.vn`
		A	2406:9c80::66^{🇻🇳 SUPERDATA2406:9c80::/48 -VN}
			PTR	`ns1.dotvndns.vn`
		A	112.213.89.3^{🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi}
			PTR	`ns1.dotvndns.vn`
NS	`ns2.dotvndns.vn`
		A	2406:9c80::9000:111^{🇻🇳 SUPERDATA2406:9c80::/48 -VN}
			PTR	`ns2.dotvndns.vn`
		A	222.255.121.247^{🇻🇳 VDC222.255.121.0/24 VNPT}
			PTR	`static.vdc.vn`
			PTR	`static.vnpt.vn`
NS	`ns3.dotvndns.vn`
		A	112.213.89.22^{🇻🇳 SUPERDATA112.213.89.0/24 Vietnam Internet Network Information Center (VNNIC) 18 Nguyen Du Str, Hai Ba Trung District, Hanoi City, Vietnam 24th floor, VNTA Tower, Duong Dinh Nghe, Cau Giay, Hanoi}
			PTR	`ns8922.dotvndns.vn`
MX	`mail.library-online.net` ⭐
		A	103.221.220.29^{🇻🇳 AZDIGI-AS-VN103.221.220.0/22 AZDIGI-VN}
TXT	`google-site-verification=knFyL069JpsAVC9_k5oHde4mMqh72B9tJTXFVe_ZmRI`
TXT	`v=spf1 a mx ~all`
SOA	`nsbak.dotvndns.com`hostmaster@library-online.net 2025-10-30 #29

`net`

	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=1778661266

Same first word

library-online.net

library-online.nl

library-online.de

library-online.org.uk

Similar names

on-linelibrary.blogspot.com

online-library.co.uk

online-library.ru

online-library.uz

online-library.ws

DNS History

9 records (6 active, 3 former)

●NSns1.dotvndns.vn2026-05-01 → 2026-05-13 · 3 obs

○ 2017-04-06 06:10:44
● 2026-05-01 09:44:28
● 2026-05-13 08:45:06

○NSns1.forevernet.de2007-09-20 → 2017-04-06 · 4 obs

● 2007-09-20 18:19:18
● 2017-04-06 06:10:44
○ 2026-05-01 09:44:28
○ 2026-05-13 08:45:06

●NSns2.dotvndns.vn2026-05-01 → 2026-05-13 · 3 obs

○ 2017-04-06 06:10:44
● 2026-05-01 09:44:28
● 2026-05-13 08:45:06

○NSns2.forevernet.de2007-09-20 → 2017-04-06 · 4 obs

● 2007-09-20 18:19:18
● 2017-04-06 06:10:44
○ 2026-05-01 09:44:28
○ 2026-05-13 08:45:06

●NSns3.dotvndns.vn2026-05-01 → 2026-05-13 · 3 obs

○ 2017-04-06 06:10:44
● 2026-05-01 09:44:28
● 2026-05-13 08:45:06

●NSnsbak.dotvndns.com2026-05-01 → 2026-05-13 · 3 obs

○ 2017-04-06 06:10:44
● 2026-05-01 09:44:28
● 2026-05-13 08:45:06

●MXmail.library-online.net2007-09-20 → 2026-05-13 · 2 obs

● 2007-09-20 18:19:18
● 2026-05-13 08:45:06

●A103.221.220.292026-05-01 → 2026-05-13 · 3 obs

○ 2017-04-06 06:10:44
● 2026-05-01 09:44:28
● 2026-05-13 08:45:06

○A195.68.246.542007-09-20 → 2017-04-06 · 4 obs

● 2007-09-20 18:19:18
● 2017-04-06 06:10:44
○ 2026-05-01 09:44:28
○ 2026-05-13 08:45:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	g.gtld-servers.net, d.gtld-servers.net, l.gtld-servers.net, b.gtld-servers.net...	-
library-online.net	nsbak.dotvndns.com, ns1.dotvndns.vn, ns2.dotvndns.vn, ns3.dotvndns.vn	-

✅ Authoritative Response

Server:112.213.89.22

NS records: nsbak.dotvndns.com, ns1.dotvndns.vn, ns2.dotvndns.vn, ns3.dotvndns.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for library-online.net (unsigned zone)

⏱️ Timing

Total: 1652ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`103.221.220.29`
NS	4	`ns2.dotvndns.vn, nsbak.dotvndns.com...`
MX	1	`mail.library-online.net (pri: 10)`
TXT	2	`google-site-verification=knFyL069JpsAVC9, v=spf1 a mx ~all`
SOA	1	`nsbak.dotvndns.com hostmaster.library-on`

Analysis

IP Addresses

library-online.net resolves to a single IP: 103.221.220.29.

Other host names, for instance asianest.vn, mail.xetaichinhhang.com.vn, aismile.com.vn, elemental.com.vn and atvstp.org.vn share IP numbers with library-online.net.

Name Servers

library-online.net is delegated to four name servers: nsbak.dotvndns.com, ns1.dotvndns.vn, ns2.dotvndns.vn and ns3.dotvndns.vn.

library-online.net shares some name servers with other domains, for example carcam.vn, suanguyenkem.net, inochi.org.vn, chovaytienmatnhanh.vn and qlkdn.vn.

These name servers are commonly used alongside ns1.pavietnam.vn, ns2.pavietnam.vn, nsbak.pavietnam.net and nsbak.dotvndns.vn.

Host names with two IP numbers: nsbak.dotvndns.com points to 2406:9c80::9000:302 and 112.213.89.22; ns1.dotvndns.vn points to 2406:9c80::66 and 112.213.89.3; ns2.dotvndns.vn points to 2406:9c80::9000:111 and 222.255.121.247.

Host names with one IP number: ns3.dotvndns.vn points to 112.213.89.22.

Host names that point to 112.213.89.22: nsbak.dotvndns.com and ns3.dotvndns.vn.

Mail Servers

library-online.net is handled by a single mail server, mail.library-online.net.

Host name mail.library-online.net points to IP 103.221.220.29.

library-online.net - robtex.com