`postcards.openone.pl`

DNSSEC	⚠️ Not signed
A	2a02:752:0:18::1552^{🇸🇪 GLESYS2a02:750::/29}
		PTR	`postcards.openone.pl`
A	46.246.47.96^{🇸🇪 GLESYS46.246.0.0/17 Portlane Network}
MX	`postcards.openone.pl` ⭐
		A	2a02:752:0:18::1552^{🇸🇪 GLESYS2a02:750::/29}
			PTR	`postcards.openone.pl`
		A	46.246.47.96^{🇸🇪 GLESYS46.246.0.0/17 Portlane Network}
			PTR	`postcards.openone.pl`
TXT	`mojecertpl-site-verification-BO8HyFdCBnis3auIng0IIRigLqdcrS0n`
TXT	`v=spf1 a mx ip4:185.107.143.171/32 ip4:46.246.47.96/32 ip6:2a02:752:0:18::155...`

`openone.pl`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:d467^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:25ba^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.37.186^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.212.103^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`nitin.ns.cloudflare.com` ⭐
NS	`summer.ns.cloudflare.com`
MX	`postcards.openone.pl` ⭐
MX	`nebbiolo-mx.openone.pl`⁽²⁰⁾
TXT	`mojecertpl-site-verification-BO8HyFdCBnis3auIng0IIRigLqdcrS0n`
TXT	`v=spf1 a mx ip4:185.107.143.171/32 ip4:46.246.47.96/32 ip6:2a02:752:0:18::155...`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.37.186, 172.67.212.103
		IPv6 hints	2606:4700:3030::ac43:d467, 2606:4700:3035::6815:25ba
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=100, name=cloudflare-ech.com
SOA	`nitin.ns.cloudflare.com`dns@cloudflare.com serial=2400345263

PTR for

96.47.246.46.in-addr.arpa

2.5.5.1.0.0.0.0.0.0.0.0.0.0.0.0.8.1.0.0.0.0.0.0.2.5.7.0.2.0.a.2.ip6.arpa

MX for

openone.pl

postcards.openone.pl

tqmsystem.pl

Same first word

Similar names

DNS History

3 records (3 active, 0 former)

●MXpostcards.openone.pl2026-02-19 → 2026-04-14 · 2 obs

● 2026-02-19 16:27:48
● 2026-04-14 06:18:42

●A2a02:752:0:18::15522026-02-19 → 2026-04-14 · 2 obs

● 2026-02-19 16:27:48
● 2026-04-14 06:18:42

●A46.246.47.962026-02-19 → 2026-04-14 · 2 obs

● 2026-02-19 16:27:48
● 2026-04-14 06:18:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
pl	a-dns.pl, b-dns.pl, d-dns.pl, f-dns.pl...	-
openone.pl	nitin.ns.cloudflare.com, summer.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.59.215

NS records: nitin.ns.cloudflare.com, summer.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for openone.pl (unsigned zone)

⏱️ Timing

Total: 648ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`46.246.47.96`
AAAA	1	`2a02:752:0:18::1552`
MX	1	`postcards.openone.pl (pri: 10)`
TXT	2	`mojecertpl-site-verification-BO8HyFdCBni, v=spf1 a mx ip4:185.107.143.171/32 ip4:4`

Analysis

Mail Server Role

postcards.openone.pl serves as the mail server for openone.pl, postcards.openone.pl and tqmsystem.pl.

nebbiolo-mx.openone.pl is a common mail server alongside postcards.openone.pl.

IP Addresses

postcards.openone.pl resolves to two IPs: 2a02:752:0:18::1552 and 46.246.47.96.

Mail Servers

One mail server handles postcards.openone.pl.

postcards.openone.pl shares some mail servers with other domains, at least partially, for instance openone.pl and tqmsystem.pl.

Host postcards.openone.pl resolves to two IPs: 2a02:752:0:18::1552 and 46.246.47.96.

postcards.openone.pl - robtex.com