AS12903 — GARANTI-TECH

AS12903 announces 9 IPv4 prefixes covering 6,912 addresses and 0 IPv6 prefixes.

About this network

A bank's network, with three of its blocks registered on the same day in 2003.

What it's used for

• The network of a Turkish bank and its technology subsidiary. 6,656 addresses across nine IPv4 prefixes, two observed BGP neighbours, and no IPv6 announced.

Notable

• Every block carries a variation of TR-GARANTIBBVABANK, some plain and some dated.
• 217.68.212.0/22, 217.68.220.0/22 and 217.68.216.0/23 all carry the date 20030716.
• 91.188.192.0/22 is dated 20181120.
• The AS handle is GARANTI-TECH.
• One of eighteen sampled addresses returned a name: usrgunpi06.garantiteknoloji.com.tr.

Interesting

• Three blocks registered on one day, then a fifteen-year gap before the next dated one. Banks do not grow their networks continuously; they run a project, request everything it needs at once, and then leave the allocation alone until the next project. The date field turns that rhythm into something you can read off the record.
• The netnames all say BBVA while the routing archive dates the AS to 2000, long before that name applied to this bank. Unlike netnames, which are effectively frozen once created, these were rewritten, which means somebody went back and updated a decade of records by hand after the ownership change.
• Two neighbours and 6,656 addresses is a network built for reliability rather than reach. The visible surface of a bank is intentionally small. The one reverse name belongs to the technology subsidiary's domain rather than the bank's, which is who actually runs the infrastructure.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 91.188.192.0/22
• 193.218.113.0/24
• 194.29.208.0/21
• 217.68.208.0/23
• 217.68.211.0/24
• 217.68.212.0/22
• 217.68.216.0/23
• 217.68.219.0/24
• 217.68.220.0/22

Upstream networks

• AS32787 Akamai Technologies, Inc.
• AS13335 Cloudflare, Inc.
• AS9121 Turk Telekomunikasyon Anonim Sirketi

Adjacent networks

• AS32787 Akamai Technologies, Inc.
• AS13335 Cloudflare, Inc.
• AS9121 Turk Telekomunikasyon Anonim Sirketi

Routing security

• RPKI: 27 valid, 0 invalid and 0 not-found announcements; 4 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 38 route objects.
• Listed in as-sets: AS-BNET, AS-BTELEKOM, AS-BTN-CUSTOMERS, AS-KDDCUSTOMER2, AS-PROLE, AS-TELSTRA-INTL-CUSTOMERS, AS-TTNET, AS-TURKTELEKOM, AS-UDOS, AS13335:AS-CUSTOMERS, AS34984:AS-TELLCOM, AS7606:AS-SA-IX.