Belfast is a city in with 423572 residents. We counted 274770 IPs from Maxmind database. Belfast has 423572 per resident.
| ASN | ASN Id | Total IP |
| Virgin Media Limited | AS5089 | 101616 |
| JISC Services Limited | AS786 | 68356 |
| * | AS33873 | 65534 |
| Sky UK Limited | AS5607 | 50758 |
| BTnet UK Regional network | AS2856 | 30978 |
| Virgin Media Limited | AS15510 | 18316 |
| TalkTalk Communications Limited | AS13285 | 18238 |
| UK Internet Service Provider | AS6871 | 12008 |
| ISP Network, UK | AS9105 | 10808 |
| EE Limited | AS12576 | 8476 |
| Banque Pictet & Cie SA | AS12649 | 8190 |
| TIBUS-ULTRAFAST | AS16032 | 6386 |
| The Internet Business Ltd | AS41678 | 4348 |
| Hibernia Atlantic (ni) Limited | AS31641 | 4340 |
| Novosco Limited | AS8789 | 3832 |
| Fujitsu Services Ltd. | AS49572 | 2046 |
| Classroom 2000 | AS35299 | 2046 |
| Kcom Group Plc | AS12513 | 2042 |
| TalkTalk | AS12708 | 1528 |
| AePONA Ltd. | AS197342 | 1022 |
| TalkTalk | AS43234 | 886 |
| Fluidone Ltd. | AS39545 | 510 |
| Vodafone Group PLC | AS1273 | 510 |
| Eircom (UK) Ltd | AS39730 | 510 |
| Ask4 Limited | AS41230 | 484 |
| British Telecommunications plc | AS3300 | 254 |
| Bouygues Telecom SA | AS5410 | 254 |
| IO Capital Princess, LLC | AS12025 | 114 |
| UK Routing | AS16353 | 62 |
| Easynet Global Services | AS4589 | 14 |
| Now maintained by Cable & Wireless Worldwide | AS2529 | 6 |
| Moss Bridge Road | AS13037 | 0 |
| Game Group UK ASN | AS21099 | 0 |