[REN-BGP-stats-all] IPv4 R&E Routing Table Report - CERNET (R&E) view

REN Routing Table Report cscora at bgp.nsrc.org
Fri Sep 22 20:10:37 UTC 2023


IPv4 R&E Routing Table Report   20:10 GMT Fri 22 Sep, 2023

  IPv4 BGP Table (R&E) as seen at CERNET.

Report Website:     https://bgp.nsrc.org/REN
Detailed Analysis:  https://bgp.nsrc.org/REN/CERNET/

Analysis Summary
----------------

BGP routing table entries examined:                               17181
    Prefixes after maximum aggregation (per Origin AS):            9839
    Deaggregation factor:                                          1.75
    Unique aggregates announced (without unneeded subnets):       10940
    Number of IPv4 prefixes with a valid ROA:                      5067
    Number of IPv4 prefixes with an invalid ROA:                     10
    Number of IPv4 prefixes with no ROA:                          12104
Total ASes present in the Internet Routing Table:                  2636
    Prefixes per ASN:                                              6.52
Origin-only ASes present in the Internet Routing Table:            2274
Origin ASes announcing only one prefix:                            1010
Transit ASes present in the Internet Routing Table:                 362
Transit-only ASes present in the Internet Routing Table:             73
Paths with bogon ASNs present in the IPv4 Routing Table:              0
Average AS path length visible in the Internet Routing Table:       4.4
    Max AS path length visible:                                      16
    Max AS path prepend of ASN (395156)                              12
Prefixes from unregistered ASNs in the Routing Table:                 3
    Number of instances of unregistered ASNs:                         3
Number of 32-bit ASNs allocated by the RIRs:                      42660
Number of 32-bit ASNs visible in the Routing Table:                 604
Prefixes from 32-bit ASNs in the Routing Table:                    1891
Number of bogon 32-bit ASNs visible in the Routing Table:             0
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:              3
Number of addresses announced to Internet:                    195310208
    Equivalent to 11 /8s, 164 /16s and 50 /24s
    Percentage of available address space announced:                5.3
    Percentage of allocated address space announced:                5.3
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.5
Total number of prefixes smaller than registry allocations:        1999

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes:                     3918
    Total APNIC prefixes after maximum aggregation:                2104
    APNIC Deaggregation factor:                                    1.86
Prefixes being announced from the APNIC address blocks:            3918
    Unique aggregates announced from the APNIC address blocks:     2499
APNIC Region origin ASes present in the Internet Routing Table:     516
    APNIC Prefixes per ASN:                                        7.59
APNIC Region origin ASes announcing only one prefix:                220
APNIC Region transit ASes present in the Internet Routing Table:     48
Average APNIC Region AS path length visible:                        4.5
    Max APNIC Region AS path length visible:                         12
Number of APNIC region 32-bit ASNs visible in the Routing Table:    197
Number of APNIC addresses announced to Internet:               44738048
    Equivalent to 2 /8s, 170 /16s and 166 /24s
APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
                       58368-59391, 63488-64098, 64297-64395, 131072-153913
APNIC Address Blocks     1/8,  14/8,  27/8,  36/8,  39/8,  42/8,  43/8,
                        49/8,  58/8,  59/8,  60/8,  61/8, 101/8, 103/8,
                       106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8,
                       116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8,
                       123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8,
                       163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8,
                       203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8,
                       222/8, 223/8,

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                      7169
    Total ARIN prefixes after maximum aggregation:                 4124
    ARIN Deaggregation factor:                                     1.74
Prefixes being announced from the ARIN address blocks:             7185
    Unique aggregates announced from the ARIN address blocks:      4559
ARIN Region origin ASes present in the Internet Routing Table:     1162
    ARIN Prefixes per ASN:                                         6.18
ARIN Region origin ASes announcing only one prefix:                 417
ARIN Region transit ASes present in the Internet Routing Table:     156
Average ARIN Region AS path length visible:                         4.5
    Max ARIN Region AS path length visible:                          16
Number of ARIN region 32-bit ASNs visible in the Routing Table:     186
Number of ARIN addresses announced to Internet:                85833984
    Equivalent to 5 /8s, 29 /16s and 185 /24s
ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations)  2138-2584, 2615-2772, 2823-2829, 2880-3153
                       3354-4607, 4865-5119, 5632-6655, 6912-7466
                       7723-8191, 10240-12287, 13312-15359, 16384-17407
                       18432-20479, 21504-23551, 25600-26591,
                       26624-27647, 29696-30719, 31744-33791
                       35840-36863, 39936-40959, 46080-47103
                       53248-55295, 62464-63487, 64198-64296, 393216-401308
ARIN Address Blocks      3/8,   4/8,   6/8,   7/8,   8/8,   9/8,  11/8,
                        12/8,  13/8,  15/8,  16/8,  17/8,  18/8,  19/8,
                        20/8,  21/8,  22/8,  23/8,  24/8,  26/8,  28/8,
                        29/8,  30/8,  32/8,  33/8,  34/8,  35/8,  38/8,
                        40/8,  44/8,  47/8,  48/8,  50/8,  52/8,  53/8,
                        54/8,  55/8,  56/8,  57/8,  63/8,  64/8,  65/8,
                        66/8,  67/8,  68/8,  69/8,  70/8,  71/8,  72/8,
                        73/8,  74/8,  75/8,  76/8,  96/8,  97/8,  98/8,
                        99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8,
                       130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8,
                       138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8,
                       147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8,
                       158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8,
                       166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8,
                       174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8,
                       206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8,
                      

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                      3612
    Total RIPE prefixes after maximum aggregation:                 2885
    RIPE Deaggregation factor:                                     1.25
Prefixes being announced from the RIPE address blocks:             3598
    Unique aggregates announced from the RIPE address blocks:      2899
RIPE Region origin ASes present in the Internet Routing Table:      687
    RIPE Prefixes per ASN:                                         5.24
RIPE Region origin ASes announcing only one prefix:                 296
RIPE Region transit ASes present in the Internet Routing Table:     109
Average RIPE Region AS path length visible:                         4.0
    Max RIPE Region AS path length visible:                          12
Number of RIPE region 32-bit ASNs visible in the Routing Table:     142
Number of RIPE addresses announced to Internet:                57984384
    Equivalent to 3 /8s, 116 /16s and 197 /24s
RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations)  2773-2822, 2830-2879, 3154-3353, 5377-5631
                       6656-6911, 8192-9215, 12288-13311, 15360-16383
                       20480-21503, 24576-25599, 28672-29695
                       30720-31743, 33792-35839, 38912-39935
                       40960-45055, 47104-52223, 56320-58367
                       59392-61439, 61952-62463, 64396-64495
                       196608-216475
RIPE Address Blocks      2/8,   5/8,  25/8,  31/8,  37/8,  46/8,  51/8,
                        62/8,  77/8,  78/8,  79/8,  80/8,  81/8,  82/8,
                        83/8,  84/8,  85/8,  86/8,  87/8,  88/8,  89/8,
                        90/8,  91/8,  92/8,  93/8,  94/8,  95/8, 109/8,
                       141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
                       193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                    1458
    Total LACNIC prefixes after maximum aggregation:                575
    LACNIC Deaggregation factor:                                   2.54
Prefixes being announced from the LACNIC address blocks:           1456
    Unique aggregates announced from the LACNIC address blocks:     786
LACNIC Region origin ASes present in the Internet Routing Table:    168
    LACNIC Prefixes per ASN:                                       8.67
LACNIC Region origin ASes announcing only one prefix:                66
LACNIC Region transit ASes present in the Internet Routing Table:    26
Average LACNIC Region AS path length visible:                       5.1
    Max LACNIC Region AS path length visible:                        13
Number of LACNIC region 32-bit ASNs visible in the Routing Table:    69
Number of LACNIC addresses announced to Internet:               4237312
    Equivalent to 0 /8s, 64 /16s and 168 /24s
LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       61440-61951, 64099-64197, 262144-273820 + ERX transfers
LACNIC Address Blocks  177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
                       191/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                   1021
    Total AfriNIC prefixes after maximum aggregation:               148
    AfriNIC Deaggregation factor:                                  6.90
Prefixes being announced from the AfriNIC address blocks:          1021
    Unique aggregates announced from the AfriNIC address blocks:    194
AfriNIC Region origin ASes present in the Internet Routing Table:    28
    AfriNIC Prefixes per ASN:                                     36.46
AfriNIC Region origin ASes announcing only one prefix:               11
AfriNIC Region transit ASes present in the Internet Routing Table:    6
Average AfriNIC Region AS path length visible:                      3.6
    Max AfriNIC Region AS path length visible:                        6
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:   10
Number of AfriNIC addresses announced to Internet:              2450432
    Equivalent to 0 /8s, 37 /16s and 100 /24s
AfriNIC AS Blocks      36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks  41/8,  45/8, 102/8, 105/8, 154/8, 196/8, 197/8,
                      

APNIC Region per AS prefix count summary
----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2907         594       2163     466  SINET-AS Research Organization of Infor
  1237         192         74     141  KREONET-AS-KR KISTI, KR
 58647         177         18       2  KAGAWAU-AS Kagawa University, JP
  7575         176        329     120  AARNET-AS-AP Australian Academic and Re
 55824         127         19      17  NKN-CORE-NW NKN Core Network, IN
  4538         112       4176      70  ERX-CERNET-BKB China Education and Rese
  4621          70         37      10  UNINET-AS-AP UNINET-, TH
  9411          66         16       2  NONTRINET-AS-AP Kasetsart University, T
  4762          63          4       1  MAHIDOL-BORDER-AS Mahidol University, T
 23570          59          5      11  INCHEON-AS-KR UNIVERSITY OF INCHEON, KR

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
   376         201        178     150  RISQ-AS, CA
  5786         197         16       1  UPRENET, PR
 18558         141         18       4  NETBLK-RCOEK, US
  2152         140        507      92  CSUNET-NW, US
    81         127        521      30  NCREN, US
 23024         113          7      17  OCDE, US
  2920         104         34       7  LACOE, US
 21976          82         51      18  NJEDGE-NET, US
  1736          79         16       1  MU-AS, US
  3477          72         63      42  NOAA-NWAVE, US

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
   680         283       1903     249  DFN Verein zur Foerderung eines Deutsch
   786         185       1767     182  JANET Jisc Services Limited, GB
  8895         136         24       5  ISU Internet Services Unit ISU, SA
   559         113        533     105  SWITCH Peering requests: peering at switch
  1103          94       1502      83  SURFNET-NL SURFnet, The Netherlands, NL
  2614          94         27      74  ROEDUNET, RO
   137          82        677      77  ASGARR Consortium GARR, IT
   553          74        465      74  BELWUE BelWue-Koordination, DE
  1930          65         81      60  RCCN Fundacao para a Ciencia e a Tecnol
  2200          64        599      59  FR-RENATER Reseau National de telecommu

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  1916         213        176      42  Rede Nacional de Ensino e Pesquisa, BR
 28391         153         10      67  Universidad Juarez Autonoma de Tabasco,
 11340         104         24      48  Red Universitaria Nacional, CL
271640          72          8       1  UNIVERSIDADE FEDERAL DE VICOSA, BR
  2715          59        102      39  Fundacao Carlos Chagas Filho de Amparo 
  4270          48         16       1  Red de Interconexion Universitaria, AR
 19611          48         17       2  Associacao Antonio Vieira - Unisinos, B
 61468          43          3      14  CEDIA, EC
 28614          38          2       2  Fundacao Universidade Regional de Blume
  3596          34          4       3  Universidad Autonoma Metropolitana, MX

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2018         383        319      71  TENET-1, ZA
 36914         260         82       3  KENET-AS, KE
327687         166         28       3  RENU, UG
  8094          47         48      18  PUKNET, ZA
327700          42         16       1  MoRENet, MZ
  3208          32          2       1  ARN, DZ
  6879          24          2       9  ENSTINET-, EG
 37501          11         49       6  UOFS, ZA
 37654          10          1       6  RwEdNet-AS, RW
 36982           8         33       8  UCT, ZA

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2907         594       2163     466  SINET-AS Research Organization of Infor
  2018         383        319      71  TENET-1, ZA
   680         283       1903     249  DFN Verein zur Foerderung eines Deutsch
 36914         260         82       3  KENET-AS, KE
  1916         213        176      42  Rede Nacional de Ensino e Pesquisa, BR
   376         201        178     150  RISQ-AS, CA
  5786         197         16       1  UPRENET, PR
  1237         192         74     141  KREONET-AS-KR KISTI, KR
   786         185       1767     182  JANET Jisc Services Limited, GB
 58647         177         18       2  KAGAWAU-AS Kagawa University, JP

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet

Global Per AS Maximum Aggregation summary
-----------------------------------------

   ASN  No of nets  Net Savings  Description
  2018         383          312  TENET-1, ZA
 36914         260          257  KENET-AS, KE
  5786         197          196  UPRENET, PR
 58647         177          175  KAGAWAU-AS Kagawa University, JP
  1916         213          171  Rede Nacional de Ensino e Pesquisa, BR
327687         166          163  RENU, UG
 18558         141          137  NETBLK-RCOEK, US
  8895         136          131  ISU Internet Services Unit ISU, SA
 55824         127          110  NKN-CORE-NW NKN Core Network, IN
    81         127           97  NCREN, US

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
    394607  UNALLOCATED  104.249.65.0/24          23024  OCDE, US
     33008  UNALLOCATED  162.248.66.0/24          11096  FLORIDANET, US
    394607  UNALLOCATED  216.100.93.0/24          23024  OCDE, US

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-badAS

Advertised Unallocated Addresses
--------------------------------

Unassigned Network     ASN Information  AS Name
134.208.0.0/16       Origin:      1659  ERX-TANET-ASN1 Taiwan Academic Network T
134.208.0.0/16      Transit:      9264  ASNET Academia Sinica, TW
192.31.196.0/24      Origin:       112  RESERVED, ZZ
192.31.196.0/24     Transit:      1103  SURFNET-NL SURFnet, The Netherlands, NL
202.58.231.0/24      Origin:    134096  EHEALTHNSW-AS-AP eHealth NSW, AU
202.58.231.0/24     Transit:      7575  AARNET-AS-AP Australian Academic and Res

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-add-IANA

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:0        /9:1       /10:2       /11:1       /12:10      
/13:18      /14:31      /15:117     /16:1902    /17:406     /18:408     
/19:510     /20:765     /21:765     /22:1388    /23:1363    /24:9488    
/25:3       /26:3       /27:0       /28:0       /29:0       /30:0       
/31:0       /32:0       

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

   ASN  No of nets  Total ann.  Description
 36914         249         260  KENET-AS, KE
  8895         131         136  ISU Internet Services Unit ISU, SA
 23024          52         113  OCDE, US
 32440          37          59  LONI, US
327700          36          42  MoRENet, MZ
 28614          32          38  Fundacao Universidade Regional de Blumenau, BR
 46115          32          35  LUTHER, US
200521          31          54  SEAP-AGE, ES
 25977          30          44  HCCS, US
 27609          29          45  USC-UNIVERSITY-HOSPITAL, US

Complete listing at https://bgp.nsrc.org/REN/CERNET/data-sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

   1:2         5:15        8:2        12:1        14:87       23:5      
  24:3        31:7        38:9        40:1        41:117      44:6      
  45:42       46:5        47:1        49:9        50:1        52:1      
  59:18       61:3        62:10       63:33       64:49       65:1      
  66:37       67:41       68:9        69:19       70:2        71:1      
  72:7        74:47       76:40       77:9        78:3        79:10     
  80:12       81:27       82:7        83:6        84:12       85:41     
  86:10       87:1        89:10       91:49       92:2        93:4      
  94:4        95:2        96:5        97:1        98:2       102:26     
 103:266     104:76      108:8       109:9       111:16      114:23     
 116:6       117:61      118:32      121:19      122:8       123:8      
 125:1       128:87      129:42      130:88      131:59      132:60     
 133:152     134:100     136:196     137:129     138:9       139:5      
 140:35      141:1       142:38      143:22      144:23      145:2      
 146:130     147:53      148:192     149:12      150:44      151:12     
 152:147     153:14      154:31      155:63      156:64      157:18     
 158:33      159:18      160:30      161:24      162:19      163:79     
 164:10      165:46      166:1       167:13      168:122     169:8      
 170:68      171:1       172:3       173:6       175:26      176:8      
 177:5       179:12      180:14      181:1       182:1       184:8      
 185:53      186:3       187:17      188:13      189:3       190:19     
 191:13      192:1275    193:297     194:144     195:90      196:197    
 197:170     198:430     199:239     200:331     201:38      202:531    
 203:418     204:342     205:123     206:183     207:163     208:71     
 209:109     210:121     211:14      212:167     213:5       216:83     
 217:10      218:3       219:5       220:16      222:1      

End of report


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