math.rs - dns.ninja
math.rs
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.math.rs ⭐ | ||||||
| A | 147.91.64.4🇷🇸 UB-AS147.91.0.0/17 Academic Network of Serbia (AMRES) | ||||||
| NS | ns.rcub.bg.ac.rs ⚠️ Not in parent delegation | ||||||
| A | 2001:4170:0:1::5🇷🇸 UB-AS2001:4170::/32 Academic Network of Serbia (AMRES) | ||||||
| PTR | ns.rcub.bg.ac.rs | ||||||
| A | 147.91.1.5🇷🇸 UB-AS147.91.0.0/17 Academic Network of Serbia (AMRES) | ||||||
| PTR | ns.rcub.bg.ac.rs | ||||||
| NS | ns1.matf.bg.ac.rs | ||||||
| NS | ns2.matf.bg.ac.rs ⚠️ Not in parent delegation | ||||||
| A | 147.91.66.2🇷🇸 UB-AS147.91.0.0/17 Academic Network of Serbia (AMRES) | ||||||
| PTR | poincare.matf.bg.ac.rs | ||||||
| NS | poincare.matf.bg.ac.rs ⚠️ Not in zone NS records | ||||||
| A | 147.91.66.2🇷🇸 UB-AS147.91.0.0/17 Academic Network of Serbia (AMRES) | ||||||
| PTR | poincare.matf.bg.ac.rs | ||||||
| MX | leukocit.math.rs ⭐ | ||||||
| A | 147.91.66.13🇷🇸 UB-AS147.91.0.0/17 Academic Network of Serbia (AMRES) | ||||||
| PTR | leukocit.matf.bg.ac.rs | ||||||
| TXT | Matematicki fakultet, Univerzitet u Beogradu | ||||||
| TXT | math.rs | ||||||
| TXT | v=spf1 ip4:147.91.66.2 ~all | ||||||
| SOA | ns1.math.rsadmin@math.rs 2026-06-18 #1 | ||||||
rs
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.nic.rs ⭐ | ||||||
| NS | b.nic.rs | ||||||
| NS | c.nic.rs | ||||||
| NS | f.nic.rs | ||||||
| NS | h.nic.rs | ||||||
| NS | l.nic.rs | ||||||
| TXT | rs zone update: 2026-08-10 01:30:04 +02:00 (EPOCH 1786318204) | ||||||
| SOA | a.nic.rshostmaster@nic.rs 2026-08-10 #5 | ||||||
Subdomains
ns1.math.rs |
diophantus.math.rs |
ns2.math.rs |
webserver.math.rs |
leukocit.math.rs |
www.math.rs |
poincare.math.rs |
alas.math.rs |
Same first word
Similar names
DNS History
8 records (6 active, 2 former)
●NSns.rcub.bg.ac.rs2026-02-17 → 2026-08-09 · 5 obs
● 2026-02-17 12:54:00
○ 2026-07-18 07:13:38
● 2026-07-20 05:55:42
● 2026-08-09 23:57:38
●NSns1.matf.bg.ac.rs2026-02-17 → 2026-08-09 · 5 obs
● 2026-02-17 12:54:00
○ 2026-07-18 07:13:38
● 2026-07-20 05:55:42
● 2026-08-09 23:57:38
●NSns1.math.rs2015-07-17 → 2026-08-09 · 5 obs
● 2017-01-16 04:36:32
○ 2026-07-18 07:13:38
● 2026-07-20 05:55:42
● 2026-08-09 23:57:38
●NSns2.matf.bg.ac.rs2026-02-17 → 2026-08-09 · 5 obs
● 2026-02-17 12:54:00
○ 2026-07-18 07:13:38
● 2026-07-20 05:55:42
● 2026-08-09 23:57:38
○NSns2.math.rs2015-07-17 → 2017-01-16 · 4 obs
● 2017-01-16 04:36:32
○ 2026-02-17 12:54:00
○ 2026-08-09 23:57:38
●NSpoincare.matf.bg.ac.rs2026-02-17 → 2026-08-09 · 7 obs
● 2026-02-17 12:54:00
○ 2026-07-14 05:03:24
● 2026-07-14 17:03:08
○ 2026-07-18 07:13:38
● 2026-07-20 05:55:42
● 2026-08-09 23:57:38
●MXleukocit.math.rs2026-02-17 → 2026-08-09 · 5 obs
● 2026-02-17 12:54:00
○ 2026-07-18 07:13:38
● 2026-07-20 05:55:42
● 2026-08-09 23:57:38
○MXpoincare.math.rs2015-07-17 → 2017-01-16 · 4 obs
● 2017-01-16 04:36:32
○ 2026-02-17 12:54:00
○ 2026-08-09 23:57:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| rs | a.nic.rs, b.nic.rs, c.nic.rs, f.nic.rs... | 12 records |
| math.rs | ns1.matf.bg.ac.rs, poincare.matf.bg.ac.rs | - |
✅ Authoritative Response
Server:147.91.66.2
NS records: ns1.matf.bg.ac.rs, poincare.matf.bg.ac.rs
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for math.rs (unsigned zone)
⏱️ Timing
Total: 1203ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 3 | ns1.matf.bg.ac.rs, ns.rcub.bg.ac.rs... |
| MX | 1 | leukocit.math.rs (pri: 10) |
| TXT | 3 | Matematicki fakultet, Univerzitet u Beog, math.rs... |
| SOA | 1 | ns1.math.rs admin.math.rs |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (a.nic.rs, a.nic.rs, b.nic.rs...)
Analysis
Hierarchy
math.rs is a parent domain; its children include ns1.math.rs, diophantus.math.rs, ns2.math.rs, webserver.math.rs, leukocit.math.rs and a few other host names.
Name Servers
math.rs delegates to five name servers: ns1.math.rs, ns1.matf.bg.ac.rs, ns2.matf.bg.ac.rs and two others.
math.rs partially shares its NS delegation with several other domains, including ac.rs, pmf.uns.ac.rs, rect.bg.ac.rs and two others.
In DNS configurations, these name servers often share authority with ns.rcub.bg.ac.rs, gaea.rcub.bg.ac.rs, ns.etf.bg.ac.rs and 7 other name servers.
Host names that point to one IP address:
ns1.math.rs has the IP address 147.91.64.4.
Host names that have two IP addresses:
ns.rcub.bg.ac.rs directs traffic to 147.91.1.5 and 2001:4170:0:1::5.
Host names that point to one IP address:
ns2.matf.bg.ac.rs has the IP address 147.91.66.2.
poincare.matf.bg.ac.rs has the IP address 147.91.66.2.
Both ns2.matf.bg.ac.rs and poincare.matf.bg.ac.rs resolve to 147.91.66.2 IP addresses each.
Mail Servers
The sole mail server for math.rs is leukocit.math.rs.
leukocit.math.rs directs to just one IP number, 147.91.66.13.