drdobbs.org - robtex.com

drdobbs.org

DNSSEC🔒 Signed (DS record present)
A2606:4700:3035::6815:4773🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:9081🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.71.115Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.144.129🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSns1.ubmdns.com ⭐
A2400:cb00:2049:1::a29f:d0🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street
PTRns1.ubmdns.com
A162.159.0.208Cloudflare162.159.0.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSns2.ubmdns.com
A2400:cb00:2049:1::a29f:1d0🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street
PTRns2.ubmdns.com
A162.159.1.208Cloudflare162.159.1.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRns2.ubmdns.com
TXTv=spf1 mx include:spf.ubm-us.net -all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.71.115, 172.67.144.129
IPv6 hints2606:4700:3035::6815:4773, 2606:4700:3035::ac43:9081
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=240, name=cloudflare-ech.com
SOAns1.ubmdns.comdns@cloudflare.com serial=2409118366

org

DNSSEC🔒 Signed (DS record present)
NSa0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation
NSa2.org.afilias-nst.info ⚠️ Not in parent delegation
NSb0.org.afilias-nst.org
NSb2.org.afilias-nst.org
NSc0.org.afilias-nst.info ⚠️ Not in parent delegation
NSd0.org.afilias-nst.org
SOAa0.org.afilias-nst.infohostmaster@donuts.email serial=1784327791

Same first word

drdobbs.(0x787878)
drdobbs.net
drdobbs.cn
drdobbs.com
drdobbs.com.cn
drdobbs.in
drdobbs.org
drdobbs.us

DNS History

18 records (6 active, 12 former)

20162017201820192020202120222023202420252026NSns1.ubmdns.comns2.ubmdns.comns1.ubm-us.netns2.ubm-us.netns3.ubm-us.netMXmailhost.ubm-us.netA104.21.71.115172.67.144.1292606:4700:3035::6815:47732606:4700:3035::ac43:9081104.24.112.98104.24.113.98192.155.42.108192.155.48.1082606:4700:3032::6818:70622606:4700:3032::6818:71622620:103::192:155:48:1082620:103:1:1:192:155:42:108
○NSns1.ubm-us.net2015-07-06 → 2017-03-22 · 4 obs
● 2015-07-06 11:05:26
● 2017-03-22 11:28:16
○ 2020-03-29 05:26:14
○ 2026-07-17 22:42:34
●NSns1.ubmdns.com2020-03-29 → 2026-07-17 · 3 obs
○ 2017-03-22 11:28:16
● 2020-03-29 05:26:14
● 2026-07-17 22:42:34
○NSns2.ubm-us.net2015-07-06 → 2017-03-22 · 4 obs
● 2015-07-06 11:05:26
● 2017-03-22 11:28:16
○ 2020-03-29 05:26:14
○ 2026-07-17 22:42:34
●NSns2.ubmdns.com2020-03-29 → 2026-07-17 · 3 obs
○ 2017-03-22 11:28:16
● 2020-03-29 05:26:14
● 2026-07-17 22:42:34
○NSns3.ubm-us.net2015-07-06 → 2017-03-22 · 4 obs
● 2015-07-06 11:05:26
● 2017-03-22 11:28:16
○ 2020-03-29 05:26:14
○ 2026-07-17 22:42:34
○MXmailhost.ubm-us.net2015-07-06 → 2020-03-29 · 4 obs
● 2015-07-06 11:05:26
● 2020-03-29 05:26:14
○ 2026-07-13 10:51:30
○ 2026-07-17 22:42:34
●A104.21.71.1152026-07-13 → 2026-07-17 · 3 obs
○ 2020-03-29 05:26:14
● 2026-07-13 10:51:30
● 2026-07-17 22:42:34
○A104.24.112.982020-03-29 → 2020-03-29 · 4 obs
○ 2017-03-22 11:28:16
● 2020-03-29 05:26:14
○ 2026-07-13 10:51:30
○ 2026-07-17 22:42:34
○A104.24.113.982020-03-29 → 2020-03-29 · 4 obs
○ 2017-03-22 11:28:16
● 2020-03-29 05:26:14
○ 2026-07-13 10:51:30
○ 2026-07-17 22:42:34
●A172.67.144.1292026-07-13 → 2026-07-17 · 3 obs
○ 2020-03-29 05:26:14
● 2026-07-13 10:51:30
● 2026-07-17 22:42:34
○A192.155.42.1082017-03-22 → 2017-03-22 · 4 obs
○ 2016-07-12 12:56:32
● 2017-03-22 11:28:16
○ 2020-03-29 05:26:14
○ 2026-07-17 22:42:34
○A192.155.48.1082015-07-06 → 2016-07-12 · 4 obs
● 2015-07-06 11:05:26
● 2016-07-12 12:56:32
○ 2017-03-22 11:28:16
○ 2026-07-17 22:42:34
○A2606:4700:3032::6818:70622020-03-29 → 2020-03-29 · 4 obs
○ 2017-03-22 11:28:16
● 2020-03-29 05:26:14
○ 2026-07-13 10:51:30
○ 2026-07-17 22:42:34
○A2606:4700:3032::6818:71622020-03-29 → 2020-03-29 · 4 obs
○ 2017-03-22 11:28:16
● 2020-03-29 05:26:14
○ 2026-07-13 10:51:30
○ 2026-07-17 22:42:34
●A2606:4700:3035::6815:47732026-07-13 → 2026-07-17 · 3 obs
○ 2020-03-29 05:26:14
● 2026-07-13 10:51:30
● 2026-07-17 22:42:34
●A2606:4700:3035::ac43:90812026-07-13 → 2026-07-17 · 3 obs
○ 2020-03-29 05:26:14
● 2026-07-13 10:51:30
● 2026-07-17 22:42:34
○A2620:103::192:155:48:1082015-07-06 → 2016-07-12 · 4 obs
● 2015-07-06 11:05:26
● 2016-07-12 12:56:32
○ 2017-03-22 11:28:16
○ 2026-07-17 22:42:34
○A2620:103:1:1:192:155:42:1082017-03-22 → 2017-03-22 · 4 obs
○ 2016-07-12 12:56:32
● 2017-03-22 11:28:16
○ 2020-03-29 05:26:14
○ 2026-07-17 22:42:34

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org-
drdobbs.orgns1.ubmdns.com, ns2.ubmdns.com-

✅ Authoritative Response

Server:162.159.0.208

NS records: ns1.ubmdns.com, ns2.ubmdns.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 2082ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.144.129, 104.21.71.115
AAAA22606:4700:3035::ac43:9081, 2606:4700:3035::6815:4773
NS2ns1.ubmdns.com, ns2.ubmdns.com
TXT1v=spf1 mx include:spf.ubm-us.net -all
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1ns1.ubmdns.com dns.cloudflare.com

Analysis

IP Addresses

drdobbs.org points to the four IP addresses 104.21.71.115, 172.67.144.129, 2606:4700:3035::6815:4773 and 2606:4700:3035::ac43:9081.

Two other host names, along with crilaisio.live, hostx.sk and vergleichsarbeiten.eu.org, also share IP numbers with drdobbs.org.

Name Servers

The NS records for drdobbs.org delegate to ns1.ubmdns.com and ns2.ubmdns.com.

drdobbs.org shares its NS records with other domains, for example appdeveloperexpo.com, unmf.co.uk, powderandbulkengineering.com and two others.

ns1.ubmdns.com resolves to 162.159.0.208 and 2400:cb00:2049:1::a29f:d0. Likewise, ns2.ubmdns.com resolves to 162.159.1.208 and 2400:cb00:2049:1::a29f:1d0 — two IP addresses apiece.