`b.root-servers.org`

DNSSEC	⚠️ Not signed
A	2001:500:204::1:0:92^{🇺🇸 B-ROOT-SERVER-OPS2001:500:204::/48 B-Root Operations}
		PTR	`b.root-servers.org`
A	206.117.5.92^{🇺🇸 Los-Nettos206.117.0.0/16 ln-net3}
NS	`ns-w.b.isi.edu` ⭐
		A	2001:1878:401::8009:1cfb^{🇺🇸 ISI2001:1878:401::/48}
			PTR	`ns-w.ant.isi.edu`
		A	128.9.28.251^{🇺🇸 ISI128.9.28.0/23}
			PTR	`ns-w.ant.isi.edu`
NS	`ns-e.b.isi.edu`
		A	2001:470:7:b8:1:0:8009:3f88^{🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA}
		A	128.9.63.136^{🇺🇸 ISI128.9.48.0/20 Proxy-registered route object for ISI}
			PTR	`ns-e.ant.isi.edu`
			PTR	`ns-e.b.isi.edu`
NS	`ns-lax.b.root-servers.org`
		A	2001:500:204::1:0:92^{🇺🇸 B-ROOT-SERVER-OPS2001:500:204::/48 B-Root Operations}
			PTR	`b.root-servers.org`
		A	206.117.5.92^{🇺🇸 Los-Nettos206.117.0.0/16 ln-net3}
			PTR	`b.root-servers.org`
MX	`ant.isi.edu` ⭐ 🔒
		A	2001:1878:401::8009:1c09^{🇺🇸 ISI2001:1878:401::/48}
			PTR	`ant.isi.edu`
		A	128.9.28.9^{🇺🇸 ISI128.9.28.0/23}
			PTR	`ant.isi.edu`
			PTR	`ant-ip4.ant.isi.edu`
SOA	`ns-w.b.isi.edu`b-poc@isi.edu serial=1739575851

`root-servers.org`

	DNSSEC	⚠️ Not signed
	A	2001:67c:2e8:25::c100:b17^{🇳🇱 RIPE-NCC-AS2001:67c:2e8::/48 RIPE-NCC}
	A	193.0.11.23^{🇳🇱 RIPE-NCC-AS193.0.10.0/23 RIPE-NCC}
	NS	`v1.h4.root-servers.org` ⭐
	NS	`a.icann-servers.net`
	NS	`jokulsa.asbyrgi.net`
	NS	`nnp.netnod.se`
	NS	`ns-ext.isc.org`
	NS	`ns.maxgigapop.net`
	NS	`sec2.authdns.ripe.net`
	MX	`v1.h4.root-servers.org` ⭐
	MX	`v1.h3.root-servers.org`⁽²⁾
	TXT	`v=spf1 +a:v1.h3.root-servers.org +a:v1.h4.root-servers.org ~all`
	SOA	`v1.h4.root-servers.org`hostmaster@root-servers.org 2026-04-13 #0

WOT: SAFE (97/100)
rank #159273 globally
rank #11098 in the tld
WOT: SAFE (96/100)
📈 Tranco rank: #213,594

PTR for

92.5.117.206.in-addr.arpa

2.9.0.0.0.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.4.0.2.0.0.0.5.0.1.0.0.2.ip6.arpa

Subdomains

ns-lax.b.root-servers.org

b-2017.b.root-servers.org

b-2004.b.root-servers.org

Same first word

b.ath.cx

b.mw

b.co.za

b.io

b.ws

b.js.cn

b.je

b.country

b.ro

b.akamaiedge-staging.net

b.top

b.ms

b.ln.cn

b.ua

b.gov.lv

b.co.kr

b.media

b.ee

b.ie

b.com.mx

b.com.de

b.gt

b.gp

b.digital

b.org

b.box

b.new

b.ls

b.st

b.cn

b.co.zw

b.watch

b.kz

b.cz

b.wtf

b.akamaiedge.net

b.my

b.gy

b.edu.vn

b.de

b.hn

b.center

b.movie

b.pl

b.kg

b.capital

b.fashion

b.sg

b.af

b.cc

b.camp

b.org.nz

b.githubusercontent.com

b.fyi

b.bi

b.bw

b.sh

b.vg

b.at

b.is

b.care

b.site

b.ph

b.lu

b.gd

b.ink

b.gold

b.art.pl

b.uy

b.sc

b.co

b.systems

b.s3.amazonaws.com

b.beer

b.sk

b.glass

b.cr

b.lol

b.akamai.net

b.cash

b.fi

b.net.nz

b.hr

b.fm

b.company

b.qh.cn

b.app

b.vodka

b.doctor

b.me

b.aivencloud.com

b.br

b.nx.cn

b.dk

b.gl

b.et

b.hm

b.info.pl

b.nu

b.link

b.co.nl

b.mr

b.ht

b.cm

b.biz

b.asia

b.green

b.co.uk

b.ai

b.akamai-staging.net

b.gov.au

b.fit

b.tc

b.gg

b.com.br

b.tv

b.hu

b.ddns.net

b.bike

b.game

b.to

b.ly

b.com.ua

b.eus

b.cl

b.fr

DNS History

16 records (6 active, 10 former)

○NScolo133.east.isi.edu2015-10-28 → 2016-04-13 · 4 obs

● 2015-10-28 09:46:20
● 2016-04-13 12:19:48
○ 2019-04-06 02:06:24
○ 2026-04-13 06:01:40

○NScolo134.east.isi.edu2015-10-28 → 2016-04-13 · 4 obs

● 2015-10-28 09:46:20
● 2016-04-13 12:19:48
○ 2019-04-06 02:06:24
○ 2026-04-13 06:01:40

●NSns-e.b.isi.edu2020-05-04 → 2026-04-13 · 3 obs

○ 2019-10-16 03:48:06
● 2020-05-04 02:31:34
● 2026-04-13 06:01:40

○NSns-lax.b.isi.edu2020-05-04 → 2020-05-17 · 5 obs

○ 2019-10-16 03:48:06
● 2020-05-04 02:31:34
● 2020-05-17 04:28:14
○ 2021-09-23 13:48:12
○ 2026-04-13 06:01:40

●NSns-lax.b.root-servers.org2021-09-23 → 2026-04-13 · 3 obs

○ 2020-05-17 04:28:14
● 2021-09-23 13:48:12
● 2026-04-13 06:01:40

○NSns-w.ant.isi.edu2019-10-16 → 2019-10-16 · 4 obs

○ 2019-04-06 02:06:24
● 2019-10-16 03:48:06
○ 2020-05-04 02:31:34
○ 2026-04-13 06:01:40

●NSns-w.b.isi.edu2020-05-04 → 2026-04-13 · 3 obs

○ 2019-10-16 03:48:06
● 2020-05-04 02:31:34
● 2026-04-13 06:01:40

○NSvm06.ant.isi.edu2015-10-28 → 2019-10-16 · 4 obs

● 2015-10-28 09:46:20
● 2019-10-16 03:48:06
○ 2020-05-04 02:31:34
○ 2026-04-13 06:01:40

○NSvm19e.ant.isi.edu2019-04-06 → 2019-10-16 · 5 obs

○ 2016-04-13 12:19:48
● 2019-04-06 02:06:24
● 2019-10-16 03:48:06
○ 2020-05-04 02:31:34
○ 2026-04-13 06:01:40

●MXant.isi.edu2026-02-15 → 2026-04-13 · 2 obs

● 2026-02-15 23:05:40
● 2026-04-13 06:01:40

○A128.9.160.2052016-01-23 → 2016-04-13 · 4 obs

● 2016-01-23 08:59:00
● 2016-04-13 12:19:48
○ 2019-04-06 02:06:24
○ 2026-04-13 06:01:40

○A128.9.168.1052019-04-06 → 2020-05-17 · 5 obs

○ 2016-04-13 12:19:48
● 2019-04-06 02:06:24
● 2020-05-17 04:28:14
○ 2021-09-23 13:48:12
○ 2026-04-13 06:01:40

○A2001:1878:400:1::8009:a0cd2016-01-23 → 2016-04-13 · 4 obs

● 2016-01-23 08:59:00
● 2016-04-13 12:19:48
○ 2019-04-06 02:06:24
○ 2026-04-13 06:01:40

○A2001:1878:400:1::8009:a8692019-04-06 → 2020-05-17 · 5 obs

○ 2016-04-13 12:19:48
● 2019-04-06 02:06:24
● 2020-05-17 04:28:14
○ 2021-09-23 13:48:12
○ 2026-04-13 06:01:40

●A2001:500:204::1:0:922021-09-23 → 2026-04-13 · 3 obs

○ 2020-05-17 04:28:14
● 2021-09-23 13:48:12
● 2026-04-13 06:01:40

●A206.117.5.922021-09-23 → 2026-04-13 · 3 obs

○ 2020-05-17 04:28:14
● 2021-09-23 13:48:12
● 2026-04-13 06:01:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
root-servers.org	ns.maxgigapop.net, nnp.netnod.se, jokulsa.asbyrgi.net, ns-ext.isc.org...	2 records
b.root-servers.org	ns-e.b.isi.edu, ns-w.b.isi.edu, ns-lax.b.root-servers.org	2 records

✅ Authoritative Response

Server:206.117.5.92

NS records: ns-e.b.isi.edu, ns-w.b.isi.edu, ns-lax.b.root-servers.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for root-servers.org (unsigned zone)

⏱️ Timing

Total: 1770ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`206.117.5.92`
AAAA	1	`2001:500:204::1:0:92`
NS	3	`ns-w.b.isi.edu, ns-lax.b.root-servers.org...`
MX	1	`ant.isi.edu (pri: 10)`
SOA	1	`ns-w.b.isi.edu b-poc.isi.edu`

📌 Glue Records Collected

Total: 4

In-bailiwick: 2 (ns-lax.b.root-servers.org, ns-lax.b.root-servers.org)

Out-of-bailiwick: 2 (ns-ext.isc.org, ns-ext.isc.org)

Analysis

Hierarchy

b.root-servers.org is a parent of ns-lax.b.root-servers.org, b-2017.b.root-servers.org and b-2004.b.root-servers.org.

IP Addresses

b.root-servers.org has two IP numbers: 2001:500:204::1:0:92 and 206.117.5.92.

Other host names, for instance ns-lax.ant.isi.edu, ns-lax.b.isi.edu and ns-lax.b.root-servers.org share IP numbers with b.root-servers.org.

Name Servers

b.root-servers.org is delegated to three name servers: ns-e.b.isi.edu, ns-w.b.isi.edu and ns-lax.b.root-servers.org.

b.root-servers.org at least partially shares name servers with other domains, including postel.org, 1.0.0.8.b.1.0.1.0.8.2.ip6.arpa, heidemann.la.ca.us, 14.9.199.in-addr.arpa and 0.0.0.0.1.0.4.0.8.7.8.1.1.0.0.2.ip6.arpa.

These name servers are commonly used with vir.isi.edu, vm19e.ant.isi.edu, vm06.ant.isi.edu, dns.postel.org, ant.isi.edu, heidemann.ant.isi.edu, ns-e.ant.isi.edu and ns-w.ant.isi.edu.

Host names with two IP numbers:

ns-e.b.isi.edu: 2001:470:7:b8:1:0:8009:3f88 and 128.9.63.136

ns-w.b.isi.edu: 2001:1878:401::8009:1cfb and 128.9.28.251

ns-lax.b.root-servers.org: 2001:500:204::1:0:92 and 206.117.5.92

Mail Servers

A single mail server handles b.root-servers.org, ant.isi.edu.

b.root-servers.org shares the same mail server setup as other domains, for instance vmhost02.ant.isi.edu, pinger-j1.ant.isi.edu, sky.ant.isi.edu, hcpu006.ant.isi.edu and ant.isi.edu.

The host name ant.isi.edu resolves to two IP numbers: 2001:1878:401::8009:1c09 and 128.9.28.9.

b.root-servers.org - robtex.com