JAKARTA · Indonesia

Two exchanges carry most of the local peering in Jakarta. JKT-IX counts 857 participants and IIX-Jakarta 810, more than the other 25 exchange records put together, with CXC Jakarta at 205 and BIX Jakarta and DE-CIX Jakarta at 177 each behind them. Capacity also sits in colocation, where Datacenter APJII-Cyber records 724 networks and IDC 3D another 524, out of the 2,611 network presences that the city's 64 facilities hold between them. No mobile carrier ASN is attached to any of the 27 exchange records.

An address that geolocates to Jakarta reflects the registry record its operator published for that block rather than the location of the equipment using it. Networks announce ranges from a single registration that can cover the whole country, and mobile traffic leaves through a small number of gateways, so a handset connected far from the city can present an address that databases place here. Geolocation providers read the operator's own published location and inherit whatever that record says.

The origin ASN and the netname on the specific prefix tell you more than the city label does. They name the network announcing the block and the party that registered it, neither of which has to sit in Jakarta. Where a prefix traces back to one of the 64 facilities listed here, the building is a closer read on position than a city field, though the 2,611 network presences recorded belong to operators whose footprints run well past the city.