A1 Belarus ASN, MCC/MNC and IP prefixes

A1 Belarus is a mobile operator in Belarus and part of A1 Telekom Austria Group, trading earlier under the brand velcom. The registry records one confirmed mobile ASN, AS42772, held by A1-BY-AS Unitary enterprise A1, and one network code pair, MCC 257 with MNC 01. Its site is a1.by.

The registry holds one ASN for A1 Belarus, AS42772, registered to A1-BY-AS Unitary enterprise A1 and marked as the operator's mobile network with confirmed confidence. At the last probe that ASN announced 383 IPv4 prefixes and 19 IPv6 prefixes, an IPv4 footprint many times the IPv6 one by prefix count. PeeringDB carries a record for it under the former brand name Velcom and sets no network type. LTE radio in Belarus runs over the state wholesale operator beCloud, AS60330, which the registry does not list as an A1 ASN.

An address whose origin ASN is AS42772 is routed by A1 Belarus, and the registry marks that ASN as the operator's mobile network, so handset traffic from this operator originates there. The same ASN carries whatever else the company routes, including fixed and business connections, so the origin tells you the operator rather than the access type. An address originating on beCloud's AS60330 belongs to the wholesale infrastructure holder and not to A1, even where an A1 subscriber uses that radio network.

Research note. Former brand velcom (PeeringDB record for AS42772 is still named 'Velcom'; RIPE whois as-name A1-BY-AS, org ORG-JMDC1-RIPE). A1 Group page states the predecessor company became part of the Group in 2007 and links a1.by. None of the 13 asn.txt candidates belong to A1; all rejected as keyword matches on 'Belarus' (universities, banks, railway, government). 4G/LTE in Belarus is provided over the state wholesale operator beCloud (Belarusian Cloud Technologies LLC, AS60330 BCTBY-AS, confirmed via RIPEstat) per the Ministry of Communications page; that ASN is infrastructure, not listed as an A1 ASN. 5G: a1.by news describes a test standalone 5G network at 3.5 GHz, not listed as a commercial generation. Operator site (a1.by) refused connections from this location; page facts taken from search-indexed content of the cited URLs.