smtp.netzero.com - dns.ninja

smtp.netzero.com

CNAMEsmtp-com.netzero.net
DNSSEC⚠️ Not signed
A64.136.44.50🇺🇸 UNSPECIFIED64.136.44.0/22 UOL DCA Block
PTRsmtp.dca.netzero.com
A64.136.52.50🇺🇸 UNSPECIFIED64.136.52.0/22 UOL VGS Block
MXmx.dca.untd.com ⭐
A64.136.44.37🇺🇸 UNSPECIFIED64.136.44.0/22 UOL DCA Block
PTRmx.dca.untd.com
MXmx.vgs.untd.com ⭐
A64.136.52.37🇺🇸 UNSPECIFIED64.136.52.0/22 UOL VGS Block
PTRmx.vgs.untd.com

netzero.com

DNSSEC⚠️ Not signed
A64.136.45.71🇺🇸 UNSPECIFIED64.136.44.0/22 UOL DCA Block
A64.136.53.71🇺🇸 UNSPECIFIED64.136.52.0/22 UOL VGS Block
NSauthns1.untd.com ⭐
NSauthns2.untd.com
NSauthns3.untd.com
MXmx.dca.untd.com ⭐
MXmx.vgs.untd.com ⭐
TXTspf2.0/pra ip4:64.136.0.0/20 ip4:64.136.16.0/21 ip4:64.136.22.0/24 ip4:64.136...
TXTv=spf1 ip4:64.136.0.0/20 ip4:64.136.16.0/21 ip4:64.136.22.0/24 ip4:64.136.28....
SOAauthns1.untd.comhostmaster@noc.untd.com 2025-12-24 #1
WOT: SAFE (60/100)
rank #475408 globally
rank #204744 in the tld
WOT: SAFE (60/100)
📈 Tranco rank: #155,323

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DNS History

5 records (1 active, 4 former)

20162017201820192020202120222023202420252026MXmx.dca.untd.commx.vgs.untd.comA64.136.44.5064.136.52.50CNAMEsmtp-com.netzero.net
○MXmx.dca.untd.com2015-10-22 → 2016-11-21 · 4 obs
● 2015-10-22 21:53:30
● 2016-11-21 15:40:28
○ 2019-05-27 05:52:04
○ 2026-07-01 19:22:26
○MXmx.vgs.untd.com2015-10-22 → 2016-11-21 · 4 obs
● 2015-10-22 21:53:30
● 2016-11-21 15:40:28
○ 2019-05-27 05:52:04
○ 2026-07-01 19:22:26
○A64.136.44.502015-06-16 → 2016-11-21 · 4 obs
● 2015-06-16 17:24:10
● 2016-11-21 15:40:28
○ 2019-05-27 05:52:04
○ 2026-07-01 19:22:26
○A64.136.52.502015-06-16 → 2016-11-21 · 4 obs
● 2015-06-16 17:24:10
● 2016-11-21 15:40:28
○ 2019-05-27 05:52:04
○ 2026-07-01 19:22:26
●CNAMEsmtp-com.netzero.net2015-06-16 → 2026-07-01 · 2 obs
● 2015-06-16 17:24:10
● 2026-07-01 19:22:26

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
netzero.comauthns2.untd.com, authns1.untd.com, authns3.untd.com3 records

✅ Authoritative Response

Server:64.136.52.60

NS records: authns2.untd.com, authns1.untd.com, authns3.untd.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for netzero.com (unsigned zone)

⏱️ Timing

Total: 211ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1smtp-com.netzero.net

📌 Glue Records Collected

Total: 3

Out-of-bailiwick: 3 (authns2.untd.com, authns1.untd.com, authns3.untd.com)

Analysis

IP Addresses

smtp.netzero.com points to the IP addresses 64.136.44.50 and 64.136.52.50

Other hosts including smtp-com.netzero.net, smtp.vgs.netzero.com and smtp.dca.netzero.com share IP addresses with smtp.netzero.com.

Mail Servers

The MX records for smtp.netzero.com point to two mail servers: mx.dca.untd.com and mx.vgs.untd.com.

smtp.netzero.com has the same mail server arrangement as a number of other domains, for example pop-com.netzero.net, co.freei.net, oh.freei.net and two more.

Both mx.dca.untd.com and mx.vgs.untd.com have a single IP address each — mx.dca.untd.com resolves to 64.136.44.37 while mx.vgs.untd.com resolves to 64.136.52.37.