jeffosullivan.com - robtex.com
jeffosullivan.com
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.netnstld@verisign-grs.com serial=1771291435 | ||||||
DNS History
18 records (14 active, 4 former)
●NSns-1039.awsdns-01.org2026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
●NSns-1871.awsdns-41.co.uk2026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
●NSns-215.awsdns-26.com2026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
●NSns-662.awsdns-18.net2026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
○NSns1.bluehost.com2019-12-16 → 2019-12-16 · 2 obs
○ 2026-03-04 11:59:30
○NSns2.bluehost.com2019-12-16 → 2019-12-16 · 2 obs
○ 2026-03-04 11:59:30
○MXmail.jeffosullivan.com2019-12-16 → 2019-12-16 · 2 obs
○ 2026-03-04 11:59:30
●MXmail.protonmail.ch2026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
●MXmailsec.protonmail.ch2026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
●A16.15.191.542026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
●A16.15.207.372026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
●A16.15.217.1772026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
●A16.15.223.522026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
●A16.182.108.1892026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
○A50.87.249.502019-12-16 → 2019-12-16 · 2 obs
○ 2026-03-04 11:59:30
●A52.216.237.1382026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
●A52.217.113.212026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
●A52.217.68.432026-03-04 → 2026-03-04 · 2 obs
● 2026-03-04 11:59:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| jeffosullivan.com | ns-215.awsdns-26.com, ns-662.awsdns-18.net, ns-1039.awsdns-01.org, ns-1871.awsdns-41.co.uk | 1 record |
✅ Authoritative Response
Server: 205.251.194.150
NS records: ns-215.awsdns-26.com, ns-662.awsdns-18.net, ns-1039.awsdns-01.org, ns-1871.awsdns-41.co.uk
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for jeffosullivan.com (unsigned zone)
⏱️ Timing
Total: 1253ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 8 | 52.217.200.205, 52.217.74.67... |
| NS | 4 | ns-1039.awsdns-01.org, ns-1871.awsdns-41.co.uk... |
| MX | 2 | mail.protonmail.ch (pri: 10), mailsec.protonmail.ch (pri: 20) |
| TXT | 2 | protonmail-verification=11e251c14699572b, v=spf1 include:_spf.protonmail.ch ~all |
| SOA | 1 | ns-215.awsdns-26.com awsdns-hostmaster.a |
📌 Glue Records Collected
Total: 1
Out-of-bailiwick: 1 (ns-215.awsdns-26.com)
Analysis
IP Addresses
jeffosullivan.com resolves to eight IP numbers: 16.15.191.54, 16.15.207.37, 16.15.217.177, 16.15.223.52, 16.182.108.189, 52.216.237.138, 52.217.68.43 and 52.217.113.21.
Other host names, for instance decisionsimulation.com, bookboon.co, codepremi.com, closeraces.com and attendium.info share IP numbers with jeffosullivan.com.
Name Servers
jeffosullivan.com delegates to four name servers: ns-215.awsdns-26.com, ns-662.awsdns-18.net, ns-1039.awsdns-01.org and ns-1871.awsdns-41.co.uk.
Host names with two IP numbers: ns-215.awsdns-26.com points to 2600:9000:5300:d700::1 and 205.251.192.215; ns-662.awsdns-18.net points to 2600:9000:5302:9600::1 and 205.251.194.150; ns-1039.awsdns-01.org points to 2600:9000:5304:f00::1 and 205.251.196.15; ns-1871.awsdns-41.co.uk points to 2600:9000:5307:4f00::1 and 205.251.199.79.
Mail Servers
jeffosullivan.com is served by two mail servers mail.protonmail.ch and mailsec.protonmail.ch.
Host names with three IP numbers:
The host name mail.protonmail.ch points to: 176.119.200.128, 185.70.42.128 and 185.205.70.128.
The host name mailsec.protonmail.ch points to: 176.119.200.129, 185.70.42.129 and 185.205.70.129.