www.ercb.com - robtex.com

www.ercb.com

DNSSEC⚠️ Not signed
A2606:4700:3033::ac43:8b50🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::6815:26d7🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.38.215Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.139.80🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.38.215, 172.67.139.80
IPv6 hints2606:4700:3033::ac43:8b50, 2606:4700:3034::6815:26d7
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=95, name=cloudflare-ech.com

ercb.com

DNSSEC⚠️ Not signed
A2606:4700:3033::ac43:8b50🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::6815:26d7🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.38.215Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.139.80🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSns1.ubmdns.com ⭐
NSns2.ubmdns.com
TXTv=spf1 mx include:spf.ubm-us.net -all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.38.215, 172.67.139.80
IPv6 hints2606:4700:3033::ac43:8b50, 2606:4700:3034::6815:26d7
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=95, name=cloudflare-ech.com
SOAns1.ubmdns.comdns@cloudflare.com serial=2402897743
WOT: SAFE (62/100)
WOT: UNKNOWN (62/100)

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DNS History

12 records (4 active, 8 former)

20162017201820192020202120222023202420252026A104.21.38.215172.67.139.802606:4700:3033::ac43:8b502606:4700:3034::6815:26d7188.114.96.0188.114.97.0192.155.42.93192.155.48.932620:103::192:155:48:932620:103:1:1:192:155:42:932a06:98c1:3120::2a06:98c1:3121::
●A104.21.38.2152026-02-25 → 2026-05-12 · 6 obs
○ 2017-03-19 23:10:50
● 2026-02-25 02:07:48
○ 2026-03-08 03:51:12
○ 2026-04-09 03:13:56
● 2026-05-07 10:10:52
● 2026-05-12 01:18:48
●A172.67.139.802026-02-25 → 2026-05-12 · 6 obs
○ 2017-03-19 23:10:50
● 2026-02-25 02:07:48
○ 2026-03-08 03:51:12
○ 2026-04-09 03:13:56
● 2026-05-07 10:10:52
● 2026-05-12 01:18:48
○A188.114.96.02026-03-08 → 2026-04-09 · 5 obs
○ 2026-02-25 02:07:48
● 2026-03-08 03:51:12
● 2026-04-09 03:13:56
○ 2026-05-07 10:10:52
○ 2026-05-12 01:18:48
○A188.114.97.02026-03-08 → 2026-04-09 · 5 obs
○ 2026-02-25 02:07:48
● 2026-03-08 03:51:12
● 2026-04-09 03:13:56
○ 2026-05-07 10:10:52
○ 2026-05-12 01:18:48
○A192.155.42.932017-03-19 → 2017-03-19 · 4 obs
○ 2016-07-16 13:46:44
● 2017-03-19 23:10:50
○ 2026-02-25 02:07:48
○ 2026-05-12 01:18:48
○A192.155.48.932015-09-02 → 2016-07-16 · 4 obs
● 2015-09-02 12:57:14
● 2016-07-16 13:46:44
○ 2017-03-19 23:10:50
○ 2026-05-12 01:18:48
●A2606:4700:3033::ac43:8b502026-02-25 → 2026-05-12 · 6 obs
○ 2017-03-19 23:10:50
● 2026-02-25 02:07:48
○ 2026-03-08 03:51:12
○ 2026-04-09 03:13:56
● 2026-05-07 10:10:52
● 2026-05-12 01:18:48
●A2606:4700:3034::6815:26d72026-02-25 → 2026-05-12 · 6 obs
○ 2017-03-19 23:10:50
● 2026-02-25 02:07:48
○ 2026-03-08 03:51:12
○ 2026-04-09 03:13:56
● 2026-05-07 10:10:52
● 2026-05-12 01:18:48
○A2620:103::192:155:48:932015-09-02 → 2016-07-16 · 4 obs
● 2015-09-02 12:57:14
● 2016-07-16 13:46:44
○ 2017-03-19 23:10:50
○ 2026-05-12 01:18:48
○A2620:103:1:1:192:155:42:932017-03-19 → 2017-03-19 · 4 obs
○ 2016-07-16 13:46:44
● 2017-03-19 23:10:50
○ 2026-02-25 02:07:48
○ 2026-05-12 01:18:48
○A2a06:98c1:3120::2026-03-08 → 2026-04-09 · 5 obs
○ 2026-02-25 02:07:48
● 2026-03-08 03:51:12
● 2026-04-09 03:13:56
○ 2026-05-07 10:10:52
○ 2026-05-12 01:18:48
○A2a06:98c1:3121::2026-03-08 → 2026-04-09 · 5 obs
○ 2026-02-25 02:07:48
● 2026-03-08 03:51:12
● 2026-04-09 03:13:56
○ 2026-05-07 10:10:52
○ 2026-05-12 01:18:48

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comb.gtld-servers.net, m.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net...-
ercb.comns1.ubmdns.com, ns2.ubmdns.com2 records

✅ Authoritative Response

Server:162.159.1.208

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

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 388ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.139.80, 104.21.38.215
AAAA22606:4700:3033::ac43:8b50, 2606:4700:3034::6815:26d7
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.ubmdns.com, ns2.ubmdns.com)

Analysis

IP Addresses

www.ercb.com resolves to four IPs: 2606:4700:3033::ac43:8b50, 2606:4700:3034::6815:26d7, 104.21.38.215 and 172.67.139.80.

Other host names, for instance ejug.cn, fgandtu.com, affordable-parts-shop.com, abcdefguy.com and thekulishschool.com share IP numbers with www.ercb.com.