IPv4 Transfers September 2021
In September 2021, the five Regional Internet Registries recorded 1,233 transfers: 5,442,304 IPv4 addresses in 920 blocks, plus 164 IPv6 blocks and 149 AS numbers. 34 transfers moved resources between two registries. Dates are the dates the registry processed the transfer.
IPv4 addresses transferred
5.4M
920 IPv4 blocks
Registry transfers
1,233
164 IPv6 / 149 ASN
Inter-RIR transfers
34
179K IPv4 addresses (3%)
Mergers and acquisitions
339
894 market transfers
Transfer Volume by RIR
Transfers counted at the receiving registry. Inter-RIR columns show IPv4 that entered or left the region.
Inter-RIR Transfers September 2021
IPv4 addresses moved from one registry to another. All inter-RIR transfers
| From ↓ / To → | RIPE NCC | ARIN | APNIC | LACNIC | AFRINIC |
|---|---|---|---|---|---|
| RIPE NCC | - | 1,280 2 transfers | 35K 4 transfers | 1,024 1 transfers | 0 |
| ARIN | 133K 16 transfers | - | 512 1 transfers | 0 | 0 |
| APNIC | 6,144 8 transfers | 2,048 2 transfers | - | 0 | 0 |
| LACNIC | 0 | 0 | 0 | - | 0 |
| AFRINIC | 0 | 0 | 0 | 0 | - |
IPv4 Transfers by Block Size
Number of transferred IPv4 blocks per prefix length.
| Prefix length | Addresses per block | Blocks | Share of blocks | IPv4 addresses |
|---|---|---|---|---|
| /13 | 524,288 | 2 | 0.2% | 1,048,576 |
| /14 | 262,144 | 1 | 0.1% | 262,144 |
| /15 | 131,072 | 2 | 0.2% | 262,144 |
| /16 | 65,536 | 27 | 2.9% | 1,769,472 |
| /17 | 32,768 | 11 | 1.2% | 360,448 |
| /18 | 16,384 | 21 | 2.3% | 344,064 |
| /19 | 8,192 | 56 | 6.1% | 458,752 |
| /20 | 4,096 | 72 | 7.8% | 294,912 |
| /21 | 2,048 | 67 | 7.3% | 137,216 |
| /22 | 1,024 | 410 | 44.6% | 419,840 |
| /23 | 512 | 80 | 8.7% | 40,960 |
| /24 | 256 | 171 | 18.6% | 43,776 |
Top Receiving Countries
- 1🇸🇬 Singapore546K
- 2🇨🇦 Canada136K
- 3🇺🇸 United States111K
- 4🇨🇳 China33K
- 5🇰🇷 South Korea4,096
- 6🇵🇭 Philippines2,304
- 7🇳🇿 New Zealand1,280
- 8🇲🇳 Mongolia1,024
- 9🇧🇷 Brazil1,024
Top Source Countries
- 1🇨🇳 China549K
- 2🇺🇸 United States137K
- 3🇨🇦 Canada84K
- 4🇬🇧 United Kingdom25K
- 5🇮🇳 India6,400
- 6🇭🇰 Hong Kong SAR China4,352
- 7🇦🇺 Australia2,816
- 8🇧🇩 Bangladesh1,024
- 9🇺🇰 United Kingdom1,024
IPv4 transferred across country borders in September 2021. Registry logs before mid-2025 do not carry a country for every transfer, so this ranking undercounts some regions.
Largest IPv4 Transfers September 2021
- 13.192.0.0/13Transfer ·
- 13.184.0.0/13Transfer ·
- 84.216.0.0/14M&A ·
- 43.140.0.0/15Transfer ·
- 43.138.0.0/15Transfer ·
- 142.164.0.0/16M&A ·
- 151.190.0.0/16M&A ·
- 146.214.0.0/16M&A ·
- 144.196.0.0/16M&A ·
- 146.190.0.0/16M&A ·
- 146.183.0.0/16M&A ·
- 23.18.0.0/16M&A ·
- 40.176.0.0/16Transfer ·
- 40.177.0.0/16Transfer ·
- 40.178.0.0/16Transfer ·
- 40.179.0.0/16Transfer ·
- 40.180.0.0/16Transfer ·
- 136.239.0.0/16M&A ·
- 209.38.0.0/16M&A ·
- 206.247.0.0/16M&A ·
- 15.235.0.0/16Transfer ·
- 43.142.0.0/16Transfer ·
- 43.137.0.0/16Transfer ·
- 148.113.0.0/16Transfer ·
- 43.143.0.0/16Transfer ·
| Date | Resource | From | To | Type |
|---|---|---|---|---|
| 13.192.0.0/13 | Transfer | |||
| 13.184.0.0/13 | Transfer | |||
| 84.216.0.0/14 | Telenor AB | Telenor Sverige AB | M&A | |
| 43.140.0.0/15 | Transfer | |||
| 43.138.0.0/15 | Transfer | |||
| 142.164.0.0/16 | M&A | |||
| 151.190.0.0/16 | M&A | |||
| 146.214.0.0/16 | M&A | |||
| 144.196.0.0/16 | M&A | |||
| 146.190.0.0/16 | M&A | |||
| 146.183.0.0/16 | M&A | |||
| 23.18.0.0/16 | M&A | |||
| 40.176.0.0/16 | Transfer | |||
| 40.177.0.0/16 | Transfer | |||
| 40.178.0.0/16 | Transfer | |||
| 40.179.0.0/16 | Transfer | |||
| 40.180.0.0/16 | Transfer | |||
| 136.239.0.0/16 | M&A | |||
| 209.38.0.0/16 | M&A | |||
| 206.247.0.0/16 | M&A | |||
| 15.235.0.0/16 | Transfer | |||
| 43.142.0.0/16 | Transfer | |||
| 43.137.0.0/16 | Transfer | |||
| 148.113.0.0/16 | Transfer | |||
| 43.143.0.0/16 | Transfer |